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

The solution to 2cos^2(x)-sin^2(x) is -3sin^2(x)+2

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

simplify

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

- 3 sin^{2} (x) + 2

Solution steps

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

Rewrite using trig identities

= - 3 sin^{2} (x) + 2

(x - 4) (x^{2} + 6 x - 1)

7 \div \frac{1}{4}

(x^{- 2} - y^{- 1})^{- 3}

3 \frac{1}{2} \div \frac{1}{2}

2^{99} + 2^{99}