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Popular >

cos(30)*7

Solution

cos (3 0^{\circ}) \cdot 7

Solution

\frac{7 3}{2}

+1

Decimal Notation

6.06217 \dots

Solution steps

cos (3 0^{\circ}) \cdot 7

Use the following trivial identity:

cos (3 0^{\circ}) = \frac{3}{2}

cos (3 0^{\circ})

cos (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} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{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} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= \frac{3}{2}

= \frac{3}{2} \cdot 7

Simplify

\frac{3}{2} \cdot 7 : \frac{7 3}{2}

\frac{3}{2} \cdot 7

Multiply fractions:

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

= \frac{3 \cdot 7}{2}

= \frac{7 3}{2}

Popular Examples

cos (3 0^{\circ}) \cdot 4

arctan((-18sqrt(2))/(-322-18sqrt(2)))

arctan (\frac{- 18 2}{- 322 - 18 2})

120 cos (1 5^{\circ})

cos (5 \cdot \frac{π}{6})

(sin (6 0^{\circ}))^{2}

Frequently Asked Questions (FAQ)

What is the value of cos(30)*7 ?
The value of cos(30)*7 is (7sqrt(3))/2