What is cos^2(2θ)-sin^2(2θ) ?

The solution to cos^2(2θ)-sin^2(2θ) is cos(4θ)

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simplify cos^2(2θ)-sin^2(2θ)

simplify

cos^{2} (2 θ) - sin^{2} (2 θ)

cos (4 θ)

Solution steps

cos^{2} (2 θ) - sin^{2} (2 θ)

Rewrite using trig identities

= cos (4 θ)

(- 6 - 3 i) - (12 + 10 i)

\frac{33}{54}

2 x^{3} - x^{2} - 6 x

9 u^{2} + 24 uv + 16 v^{2}

510 + 5160