What is the general solution for tan(x-10)cot(20-x)=1 ?

The general solution for tan(x-10)cot(20-x)=1 is x=180n+15,x=105+180n

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tan(x-10)cot(20-x)=1

Solution

tan (x - 1 0^{\circ}) cot (2 0^{\circ} - x) = 1

Solution

x = 18 0^{\circ} n + 1 5^{\circ}, x = 10 5^{\circ} + 18 0^{\circ} n

Radians

x = \frac{π}{12} + πn, x = \frac{7 π}{12} + πn

Solution steps

tan (x - 1 0^{\circ}) cot (2 0^{\circ} - x) = 1

Subtract

1

from both sides

tan (x - 1 0^{\circ}) cot (2 0^{\circ} - x) - 1 = 0

Simplify

tan (x - 1 0^{\circ}) cot (2 0^{\circ} - x) - 1 : tan (\frac{18 x - 18 0 ^{\circ}}{18}) cot (\frac{18 0 ^{\circ} - 9 x}{9}) - 1

tan (x - 1 0^{\circ}) cot (2 0^{\circ} - x) - 1

tan (x - 1 0^{\circ}) cot (2 0^{\circ} - x) = tan (\frac{18 x - 18 0 ^{\circ}}{18}) cot (\frac{18 0 ^{\circ} - 9 x}{9})

tan (x - 1 0^{\circ}) cot (2 0^{\circ} - x)

Join

x - 1 0^{\circ} : \frac{18 x - 18 0 ^{\circ}}{18}

x - 1 0^{\circ}

Convert element to fraction:

x = \frac{x 18}{18}

= \frac{x \cdot 18}{18} - 1 0^{\circ}

Since the denominators are equal, combine the fractions:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{x \cdot 18 - 18 0 ^{\circ}}{18}

= tan (\frac{18 x - 18 0 ^{\circ}}{18}) cot (- x + 2 0^{\circ})

Join

2 0^{\circ} - x : \frac{18 0 ^{\circ} - 9 x}{9}

2 0^{\circ} - x

Convert element to fraction:

x = \frac{x 9}{9}

= 2 0^{\circ} - \frac{x \cdot 9}{9}

Since the denominators are equal, combine the fractions:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{18 0 ^{\circ} - x \cdot 9}{9}

= tan (\frac{18 x - 18 0 ^{\circ}}{18}) cot (\frac{- 9 x + 18 0 ^{\circ}}{9})

= tan (\frac{18 x - 18 0 ^{\circ}}{18}) cot (\frac{- 9 x + 18 0 ^{\circ}}{9}) - 1

tan (\frac{18 x - 18 0 ^{\circ}}{18}) cot (\frac{18 0 ^{\circ} - 9 x}{9}) - 1 = 0

Express with sin, cos

- 1 + cot (\frac{18 0 ^{\circ} - 9 x}{9}) tan (\frac{- 18 0 ^{\circ} + 18 x}{18})

Use the basic trigonometric identity:

cot (x) = \frac{cos ( x )}{sin ( x )}

= - 1 + \frac{cos ( \frac{18 0 ^{\circ} - 9 x}{9} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} )} tan (\frac{- 18 0 ^{\circ} + 18 x}{18})

Use the basic trigonometric identity:

tan (x) = \frac{sin ( x )}{cos ( x )}

= - 1 + \frac{cos ( \frac{18 0 ^{\circ} - 9 x}{9} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} )} \cdot \frac{sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}

Simplify

- 1 + \frac{cos ( \frac{18 0 ^{\circ} - 9 x}{9} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} )} \cdot \frac{sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )} : \frac{- sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} ) + cos ( \frac{18 0 ^{\circ} - 9 x}{9} ) sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}

- 1 + \frac{cos ( \frac{18 0 ^{\circ} - 9 x}{9} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} )} \cdot \frac{sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}

Multiply

\frac{cos ( \frac{18 0 ^{\circ} - 9 x}{9} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} )} \cdot \frac{sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )} : \frac{cos ( \frac{- 9 x + 18 0 ^{\circ}}{9} ) sin ( \frac{18 x - 18 0 ^{\circ}}{18} )}{sin ( \frac{- 9 x + 18 0 ^{\circ}}{9} ) cos ( \frac{18 x - 18 0 ^{\circ}}{18} )}

\frac{cos ( \frac{18 0 ^{\circ} - 9 x}{9} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} )} \cdot \frac{sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}

Multiply fractions:

\frac{a}{b} \cdot \frac{c}{d} = \frac{a \cdot c}{b \cdot d}

= \frac{cos ( \frac{18 0 ^{\circ} - 9 x}{9} ) sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}

= - 1 + \frac{cos ( \frac{- 9 x + 18 0 ^{\circ}}{9} ) sin ( \frac{18 x - 18 0 ^{\circ}}{18} )}{sin ( \frac{- 9 x + 18 0 ^{\circ}}{9} ) cos ( \frac{18 x - 18 0 ^{\circ}}{18} )}

Convert element to fraction:

1 = \frac{1 sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}

= - \frac{1 \cdot sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )} + \frac{cos ( \frac{18 0 ^{\circ} - 9 x}{9} ) sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}

Since the denominators are equal, combine the fractions:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{- 1 \cdot sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} ) + cos ( \frac{18 0 ^{\circ} - 9 x}{9} ) sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}

Multiply:

1 \cdot sin (\frac{18 0 ^{\circ} - 9 x}{9}) = sin (\frac{18 0 ^{\circ} - 9 x}{9})

= \frac{- sin ( \frac{- 9 x + 18 0 ^{\circ}}{9} ) cos ( \frac{18 x - 18 0 ^{\circ}}{18} ) + cos ( \frac{- 9 x + 18 0 ^{\circ}}{9} ) sin ( \frac{18 x - 18 0 ^{\circ}}{18} )}{sin ( \frac{- 9 x + 18 0 ^{\circ}}{9} ) cos ( \frac{18 x - 18 0 ^{\circ}}{18} )}

= \frac{- sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} ) + cos ( \frac{18 0 ^{\circ} - 9 x}{9} ) sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}

\frac{- cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} ) sin ( \frac{18 0 ^{\circ} - 9 x}{9} ) + cos ( \frac{18 0 ^{\circ} - 9 x}{9} ) sin ( \frac{- 18 0 ^{\circ} + 18 x}{18} )}{cos ( \frac{- 18 0 ^{\circ} + 18 x}{18} ) sin ( \frac{18 0 ^{\circ} - 9 x}{9} )} = 0

\frac{f ( x )}{g ( x )} = 0 \Rightarrow f (x) = 0

- cos (\frac{- 18 0 ^{\circ} + 18 x}{18}) sin (\frac{18 0 ^{\circ} - 9 x}{9}) + cos (\frac{18 0 ^{\circ} - 9 x}{9}) sin (\frac{- 18 0 ^{\circ} + 18 x}{18}) = 0

Rewrite using trig identities

- cos (\frac{- 18 0 ^{\circ} + 18 x}{18}) sin (\frac{18 0 ^{\circ} - 9 x}{9}) + cos (\frac{18 0 ^{\circ} - 9 x}{9}) sin (\frac{- 18 0 ^{\circ} + 18 x}{18})

Use the Angle Difference identity:

sin (s) cos (t) - cos (s) sin (t) = sin (s - t)

= sin (\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9})

sin (\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9}) = 0

General solutions for

sin (\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9}) = 0

sin (x)

periodicity table with

36 0^{\circ} n

cycle:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 0 + 36 0^{\circ} n, \frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 18 0^{\circ} + 36 0^{\circ} n

\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 0 + 36 0^{\circ} n, \frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 18 0^{\circ} + 36 0^{\circ} n

Solve

\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 0 + 36 0^{\circ} n : x = 18 0^{\circ} n + 1 5^{\circ}

\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 0 + 36 0^{\circ} n

0 + 36 0^{\circ} n = 36 0^{\circ} n

\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 36 0^{\circ} n

Multiply by LCM

\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 36 0^{\circ} n

Find Least Common Multiplier of

18, 9 : 18

18, 9

Least Common Multiplier (LCM)

Prime factorization of

18 : 2 \cdot 3 \cdot 3

18

18

divides by

218 = 9 \cdot 2

= 2 \cdot 9

9

divides by

39 = 3 \cdot 3

= 2 \cdot 3 \cdot 3

2, 3

are all prime numbers, therefore no further factorization is possible

= 2 \cdot 3 \cdot 3

Prime factorization of

9 : 3 \cdot 3

9

9

divides by

39 = 3 \cdot 3

= 3 \cdot 3

Multiply each factor the greatest number of times it occurs in either

18

9

= 2 \cdot 3 \cdot 3

Multiply the numbers:

2 \cdot 3 \cdot 3 = 18

= 18

Multiply by LCM=

18

\frac{- 18 0 ^{\circ} + 18 x}{18} \cdot 18 - \frac{18 0 ^{\circ} - 9 x}{9} \cdot 18 = 36 0^{\circ} n \cdot 18

Simplify

\frac{- 18 0 ^{\circ} + 18 x}{18} \cdot 18 - \frac{18 0 ^{\circ} - 9 x}{9} \cdot 18 = 36 0^{\circ} n \cdot 18

Simplify

\frac{- 18 0 ^{\circ} + 18 x}{18} \cdot 18 : - 18 0^{\circ} + 18 x

\frac{- 18 0 ^{\circ} + 18 x}{18} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{( - 18 0 ^{\circ} + 18 x ) \cdot 18}{18}

Cancel the common factor:

18

= - - 18 0^{\circ} + 18 x

Simplify

- \frac{18 0 ^{\circ} - 9 x}{9} \cdot 18 : - 2 (- 9 x + 18 0^{\circ})

- \frac{18 0 ^{\circ} - 9 x}{9} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= - \frac{( 18 0 ^{\circ} - 9 x ) \cdot 18}{9}

Divide the numbers:

\frac{18}{9} = 2

= - 2 (- 9 x + 18 0^{\circ})

Simplify

36 0^{\circ} n \cdot 18 : 648 0^{\circ} n

36 0^{\circ} n \cdot 18

Multiply the numbers:

2 \cdot 18 = 36

= 648 0^{\circ} n

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ}) = 648 0^{\circ} n

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ}) = 648 0^{\circ} n

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ}) = 648 0^{\circ} n

Expand

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ}) : 36 x - 54 0^{\circ}

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ})

Expand

- 2 (- 9 x + 18 0^{\circ}) : 18 x - 36 0^{\circ}

- 2 (- 9 x + 18 0^{\circ})

Apply the distributive law:

a (b + c) = ab + a c

a = - 2, b = - 9 x, c = 18 0^{\circ}

= - 2 (- 9 x) + (- 2) 18 0^{\circ}

Apply minus-plus rules

- (- a) = a, + (- a) = - a

= 2 \cdot 9 x - 36 0^{\circ}

Multiply the numbers:

2 \cdot 9 = 18

= 18 x - 36 0^{\circ}

= - 18 0^{\circ} + 18 x + 18 x - 36 0^{\circ}

Simplify

- 18 0^{\circ} + 18 x + 18 x - 36 0^{\circ} : 36 x - 54 0^{\circ}

- 18 0^{\circ} + 18 x + 18 x - 36 0^{\circ}

Group like terms

= 18 x + 18 x - 18 0^{\circ} - 36 0^{\circ}

Add similar elements:

18 x + 18 x = 36 x

= 36 x - 18 0^{\circ} - 36 0^{\circ}

Add similar elements:

- 18 0^{\circ} - 36 0^{\circ} = - 54 0^{\circ}

= 36 x - 54 0^{\circ}

= 36 x - 54 0^{\circ}

36 x - 54 0^{\circ} = 648 0^{\circ} n

Move

54 0^{\circ}

to the right side

36 x - 54 0^{\circ} = 648 0^{\circ} n

Add

54 0^{\circ}

to both sides

36 x - 54 0^{\circ} + 54 0^{\circ} = 648 0^{\circ} n + 54 0^{\circ}

Simplify

36 x = 648 0^{\circ} n + 54 0^{\circ}

36 x = 648 0^{\circ} n + 54 0^{\circ}

Divide both sides by

36

36 x = 648 0^{\circ} n + 54 0^{\circ}

Divide both sides by

36

\frac{36 x}{36} = \frac{648 0 ^{\circ} n}{36} + 1 5^{\circ}

Simplify

\frac{36 x}{36} = \frac{648 0 ^{\circ} n}{36} + 1 5^{\circ}

Simplify

\frac{36 x}{36} : x

\frac{36 x}{36}

Divide the numbers:

\frac{36}{36} = 1

= x

Simplify

\frac{648 0 ^{\circ} n}{36} + 1 5^{\circ} : 18 0^{\circ} n + 1 5^{\circ}

\frac{648 0 ^{\circ} n}{36} + 1 5^{\circ}

Divide the numbers:

\frac{36}{36} = 1

= 18 0^{\circ} n + 1 5^{\circ}

Cancel

1 5^{\circ} : 1 5^{\circ}

1 5^{\circ}

Cancel the common factor:

3

= 1 5^{\circ}

= 18 0^{\circ} n + 1 5^{\circ}

x = 18 0^{\circ} n + 1 5^{\circ}

x = 18 0^{\circ} n + 1 5^{\circ}

x = 18 0^{\circ} n + 1 5^{\circ}

Solve

\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 18 0^{\circ} + 36 0^{\circ} n : x = 10 5^{\circ} + 18 0^{\circ} n

\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 18 0^{\circ} + 36 0^{\circ} n

Multiply by LCM

\frac{- 18 0 ^{\circ} + 18 x}{18} - \frac{18 0 ^{\circ} - 9 x}{9} = 18 0^{\circ} + 36 0^{\circ} n

Find Least Common Multiplier of

18, 9 : 18

18, 9

Least Common Multiplier (LCM)

Prime factorization of

18 : 2 \cdot 3 \cdot 3

18

18

divides by

218 = 9 \cdot 2

= 2 \cdot 9

9

divides by

39 = 3 \cdot 3

= 2 \cdot 3 \cdot 3

2, 3

are all prime numbers, therefore no further factorization is possible

= 2 \cdot 3 \cdot 3

Prime factorization of

9 : 3 \cdot 3

9

9

divides by

39 = 3 \cdot 3

= 3 \cdot 3

Multiply each factor the greatest number of times it occurs in either

18

9

= 2 \cdot 3 \cdot 3

Multiply the numbers:

2 \cdot 3 \cdot 3 = 18

= 18

Multiply by LCM=

18

\frac{- 18 0 ^{\circ} + 18 x}{18} \cdot 18 - \frac{18 0 ^{\circ} - 9 x}{9} \cdot 18 = 18 0^{\circ} 18 + 36 0^{\circ} n \cdot 18

Simplify

\frac{- 18 0 ^{\circ} + 18 x}{18} \cdot 18 - \frac{18 0 ^{\circ} - 9 x}{9} \cdot 18 = 18 0^{\circ} 18 + 36 0^{\circ} n \cdot 18

Simplify

\frac{- 18 0 ^{\circ} + 18 x}{18} \cdot 18 : - 18 0^{\circ} + 18 x

\frac{- 18 0 ^{\circ} + 18 x}{18} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{( - 18 0 ^{\circ} + 18 x ) \cdot 18}{18}

Cancel the common factor:

18

= - - 18 0^{\circ} + 18 x

Simplify

- \frac{18 0 ^{\circ} - 9 x}{9} \cdot 18 : - 2 (- 9 x + 18 0^{\circ})

- \frac{18 0 ^{\circ} - 9 x}{9} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= - \frac{( 18 0 ^{\circ} - 9 x ) \cdot 18}{9}

Divide the numbers:

\frac{18}{9} = 2

= - 2 (- 9 x + 18 0^{\circ})

Simplify

18 0^{\circ} 18 : 324 0^{\circ}

18 0^{\circ} 18

Apply the commutative law:

18 0^{\circ} 18 = 324 0^{\circ}

324 0^{\circ}

Simplify

36 0^{\circ} n \cdot 18 : 648 0^{\circ} n

36 0^{\circ} n \cdot 18

Multiply the numbers:

2 \cdot 18 = 36

= 648 0^{\circ} n

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ}) = 324 0^{\circ} + 648 0^{\circ} n

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ}) = 324 0^{\circ} + 648 0^{\circ} n

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ}) = 324 0^{\circ} + 648 0^{\circ} n

Expand

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ}) : 36 x - 54 0^{\circ}

- 18 0^{\circ} + 18 x - 2 (- 9 x + 18 0^{\circ})

Expand

- 2 (- 9 x + 18 0^{\circ}) : 18 x - 36 0^{\circ}

- 2 (- 9 x + 18 0^{\circ})

Apply the distributive law:

a (b + c) = ab + a c

a = - 2, b = - 9 x, c = 18 0^{\circ}

= - 2 (- 9 x) + (- 2) 18 0^{\circ}

Apply minus-plus rules

- (- a) = a, + (- a) = - a

= 2 \cdot 9 x - 36 0^{\circ}

Multiply the numbers:

2 \cdot 9 = 18

= 18 x - 36 0^{\circ}

= - 18 0^{\circ} + 18 x + 18 x - 36 0^{\circ}

Simplify

- 18 0^{\circ} + 18 x + 18 x - 36 0^{\circ} : 36 x - 54 0^{\circ}

- 18 0^{\circ} + 18 x + 18 x - 36 0^{\circ}

Group like terms

= 18 x + 18 x - 18 0^{\circ} - 36 0^{\circ}

Add similar elements:

18 x + 18 x = 36 x

= 36 x - 18 0^{\circ} - 36 0^{\circ}

Add similar elements:

- 18 0^{\circ} - 36 0^{\circ} = - 54 0^{\circ}

= 36 x - 54 0^{\circ}

= 36 x - 54 0^{\circ}

36 x - 54 0^{\circ} = 324 0^{\circ} + 648 0^{\circ} n

Move

54 0^{\circ}

to the right side

36 x - 54 0^{\circ} = 324 0^{\circ} + 648 0^{\circ} n

Add

54 0^{\circ}

to both sides

36 x - 54 0^{\circ} + 54 0^{\circ} = 324 0^{\circ} + 648 0^{\circ} n + 54 0^{\circ}

Simplify

36 x = 378 0^{\circ} + 648 0^{\circ} n

36 x = 378 0^{\circ} + 648 0^{\circ} n

Divide both sides by

36

36 x = 378 0^{\circ} + 648 0^{\circ} n

Divide both sides by

36

\frac{36 x}{36} = 10 5^{\circ} + \frac{648 0 ^{\circ} n}{36}

Simplify

\frac{36 x}{36} = 10 5^{\circ} + \frac{648 0 ^{\circ} n}{36}

Simplify

\frac{36 x}{36} : x

\frac{36 x}{36}

Divide the numbers:

\frac{36}{36} = 1

= x

Simplify

10 5^{\circ} + \frac{648 0 ^{\circ} n}{36} : 10 5^{\circ} + 18 0^{\circ} n

10 5^{\circ} + \frac{648 0 ^{\circ} n}{36}

Cancel

10 5^{\circ} : 10 5^{\circ}

10 5^{\circ}

Cancel the common factor:

3

= 10 5^{\circ}

= 10 5^{\circ} + \frac{648 0 ^{\circ} n}{36}

Divide the numbers:

\frac{36}{36} = 1

= 10 5^{\circ} + 18 0^{\circ} n

x = 10 5^{\circ} + 18 0^{\circ} n

x = 10 5^{\circ} + 18 0^{\circ} n

x = 10 5^{\circ} + 18 0^{\circ} n

x = 18 0^{\circ} n + 1 5^{\circ}, x = 10 5^{\circ} + 18 0^{\circ} n

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Frequently Asked Questions (FAQ)

What is the general solution for tan(x-10)cot(20-x)=1 ?
The general solution for tan(x-10)cot(20-x)=1 is x=180n+15,x=105+180n