What is cos(2pi-npi) ?

The solution to cos(2pi-npi) is (-1)^n

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

simplify cos(2pi-npi)

simplify

cos (2 π - nπ)

(- 1)^{n}

Solution steps

cos (2 π - nπ)

Rewrite using trig identities

= cos (πn)

Use the basic trigonometric identity:

cos (nπ) = (- 1)^{n}

= (- 1)^{n}

sin (a + a)

sin (arccos (v))

- 2 sin (- 8 x + \frac{π}{1})

- 7.2 π cos (120 π t + \frac{π}{2})

6 csc (\frac{π}{3} x + π)