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

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

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

simplify

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

cos (2 x) - cos (x)

Solution steps

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

Use the Double Angle identity:

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

= cos (2 x) - cos (x)

9 - 3 (- 4 + 3 x) + 12 x

2 (52)

5 x^{2} - 42 x + 49

3 - \frac{5}{6}

\frac{12 a}{a}

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