en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

(cos(pi))/pi

Solution

\frac{cos ( π )}{π}

Solution

- \frac{1}{π}

+1

Decimal Notation

- 0.31830 \dots

Solution steps

\frac{cos ( π )}{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)

= \frac{- 1}{π}

Simplify

= - \frac{1}{π}

Popular Examples

59 tan (5 8^{\circ})

arccos(5/(sqrt(34)))

arccos (\frac{5}{34})

sin(-1((11sin(120))/(18)))

sin (- 1 (\frac{11 sin ( 12 0 ^{\circ} )}{18}))

3 cos (π)

cos(5/13+(-3/5))

cos (\frac{5}{13} + (- \frac{3}{5}))

Frequently Asked Questions (FAQ)

What is the value of (cos(pi))/pi ?
The value of (cos(pi))/pi is -1/pi