en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

3-3cos(pi)

Solution

3 - 3 cos (π)

Solution

6

Solution steps

3 - 3 cos (π)

Use the following trivial identity:

cos (π) = (- 1)

cos (π)

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}

= (- 1)

= 3 - 3 (- 1)

Simplify

= 6

Popular Examples

arctan(((sqrt(3))/2)/((-1)/2))

arctan (\frac{\frac{3}{2}}{\frac{- 1}{2}})

5 \cdot sin (\frac{7 π}{4})

((5arcsin(1))-(5arcsin(-1)))/(1-(-1))

\frac{( 5 arcsin ( 1 ) ) - ( 5 arcsin ( - 1 ) )}{1 - ( - 1 )}

2 sin (\frac{3 π}{3})

2 tan (3 6^{\circ})

Frequently Asked Questions (FAQ)

What is the value of 3-3cos(pi) ?
The value of 3-3cos(pi) is 6