en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

simplify cos(n*(-pi))

Solution

simplify

cos (n \cdot (- π))

Solution

(- 1)^{- n}

Solution steps

cos (n (- π))

Use the basic trigonometric identity:

cos (nπ) = (- 1)^{n}

= (- 1)^{- n}

Popular Examples

simplify cos(x+(3pi)/2)simplify

cos (x + \frac{3 π}{2})

simplify sin(30-x)simplify

sin (3 0^{\circ} - x)

simplify sec(arctan(x/3))simplify

sec (arctan (\frac{x}{3}))

simplify sin(arccos(y))simplify

sin (arccos (y))

simplify tan(90-θ)simplify

tan (9 0^{\circ} - θ)

Frequently Asked Questions (FAQ)

What is cos(n*(-pi)) ?
The solution to cos(n*(-pi)) is (-1)^{-n}