What is sin(npi+pi/2) ?

The solution to sin(npi+pi/2) is (-1)^n

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

simplify sin(npi+pi/2)

simplify

sin (nπ + \frac{π}{2})

(- 1)^{n}

Solution steps

sin (nπ + \frac{π}{2})

Rewrite using trig identities

= cos (πn)

Use the basic trigonometric identity:

cos (nπ) = (- 1)^{n}

= (- 1)^{n}

100 sin (80 t + 1 5^{\circ})

sin (\frac{75 π}{2} - x)

tan (- s e^{45})

cos (- A)

- cos (πn) + cos (- πn)