What is the general solution for 4cos^2(x)=0 ?

The general solution for 4cos^2(x)=0 is x= pi/2+2pin,x=(3pi)/2+2pin

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4cos^2(x)=0

4 cos^{2} (x) = 0

x = \frac{π}{2} + 2 πn, x = \frac{3 π}{2} + 2 πn

Degrees

x = 9 0^{\circ} + 36 0^{\circ} n, x = 27 0^{\circ} + 36 0^{\circ} n

Solution steps

4 cos^{2} (x) = 0

Divide both sides by

4

4 cos^{2} (x) = 0

Divide both sides by

4

4 cos^{2} (x) = 0

Divide both sides by

4

\frac{4 cos ^{2} ( x )}{4} = \frac{0}{4}

Simplify

cos^{2} (x) = 0

cos^{2} (x) = 0

Apply rule

x^{n} = 0 \Rightarrow x = 0

cos (x) = 0

General solutions for

cos (x) = 0

cos (x)

periodicity table with

2 πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

x = \frac{π}{2} + 2 πn, x = \frac{3 π}{2} + 2 πn

x = \frac{π}{2} + 2 πn, x = \frac{3 π}{2} + 2 πn

sin (2 x) = \frac{2 \cdot 10 \cdot 1500000}{11000000}

\frac{2}{tan ( x )} = 3 - tan (x)

tan (x) = 0.158

- 1 = sin (4.18879 x)

\frac{1}{sin ( x ) cos ( x )} = 22

What is the general solution for 4cos^2(x)=0 ?
The general solution for 4cos^2(x)=0 is x= pi/2+2pin,x=(3pi)/2+2pin