What is expand cos((3-n)pi) ?

The solution to expand cos((3-n)pi) is -(-1)^n

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

expand cos((3-n)pi)

expand

cos ((3 - n) π)

- (- 1)^{n}

Solution steps

cos ((3 - n) π)

Expand

(3 - n) π : 3 π - πn

= cos (3 π - πn)

Rewrite using trig identities

= - cos (πn)

Use the basic trigonometric identity:

cos (nπ) = (- 1)^{n}

= - (- 1)^{n}

y (\frac{x ^{2}}{y ^{2}} - 2)

i w (T i w + 1) (i w + 1)

(x^{3} + 8 x)^{2} (3 x^{2} + 8) d x

(1 + x) y^{'} (x) - 2 y

- \frac{5 π ( x + 2 ) ( x - 2 ) ( 3 x ^{2} - 20 )}{16}