What is expand (3-3cos(x))^2 ?

The solution to expand (3-3cos(x))^2 is 9-18cos(x)+9cos^2(x)

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

expand (3-3cos(x))^2

expand

(3 - 3 cos (x))^{2}

9 - 18 cos (x) + 9 cos^{2} (x)

Solution steps

(3 - 3 cos (x))^{2}

Apply Perfect Square Formula:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(3 - 3 cos (x))^{2} = 3^{2} - 2 \cdot 3 \cdot 3 cos (x) + (3 cos (x))^{2}

= 3^{2} - 2 \cdot 3 \cdot 3 cos (x) + (3 cos (x))^{2}

Simplify

3^{2} - 2 \cdot 3 \cdot 3 cos (x) + (3 cos (x))^{2} : 9 - 18 cos (x) + 9 cos^{2} (x)

= 9 - 18 cos (x) + 9 cos^{2} (x)

(x - 15) (x + 15)

\frac{s + 4}{s ( s + 1 ) ( s ^{2} + 6 s + 13 )}

cos (2 t) + e^{- 2 π s} (t + π - cos (2 t))

(5 - x 3)^{2}

δ (x + 1)

What is expand (3-3cos(x))^2 ?
The solution to expand (3-3cos(x))^2 is 9-18cos(x)+9cos^2(x)