What is 2cos^2(x)-cos(x)-1 ?

The solution to 2cos^2(x)-cos(x)-1 is cos(2x)-cos(x)

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

simplify 2cos^2(x)-cos(x)-1

simplify

2 cos^{2} (x) - cos (x) - 1

cos (2 x) - cos (x)

Solution steps

2 cos^{2} (x) - cos (x) - 1

Use the Double Angle identity:

2 cos^{2} (x) - 1 = cos (2 x)

= cos (2 x) - cos (x)

5 \cdot (- 5)

(s - 2) (s + 1)

(36 + 64)

(- 5.2) + (- 3.8) - {(- 1.2) - [(- 0.5) - (- 0.7)]}

What is 2cos^2(x)-cos(x)-1 ?
The solution to 2cos^2(x)-cos(x)-1 is cos(2x)-cos(x)