en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

-cos(pi*0)

Solution

- cos (π \cdot 0)

Solution

- 1

Solution steps

- cos (π 0)

Rewrite using trig identities:

cos (π 0) = 1

cos (π 0)

Simplify

= cos (0)

Use the following trivial identity:

cos (0) = 1

cos (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}

= 1

= 1

= - 1

Popular Examples

69.8cos(74.044)

69.8 cos (74.04 4^{\circ})

sqrt(95^2+57.73^2-2*95*57.73sin(30))

9 5^{2} + 57.7 3^{2} - 2 \cdot 95 \cdot 57.73 sin (3 0^{\circ})

3 cos (5 5^{\circ})

18.84 - sin (3 π)

(arctan(3))/(10)

\frac{arctan ( 3 )}{10}

Frequently Asked Questions (FAQ)

What is the value of -cos(pi*0) ?
The value of -cos(pi*0) is -1