Verify the Identity cos(2x)^2+sin(2x)^2=1

$\cos^{2} (2 x) + \sin^{2} (2 x) = 1$

Start on the left side.

$\cos^{2} (2 x) + \sin^{2} (2 x)$

Apply pythagorean identity.

$1$

Because the two sides have been shown to be equivalent, the equation is an identity.

$\cos^{2} (2 x) + \sin^{2} (2 x) = 1$ is an identity

Verify the Identity cos(2x)^2+sin(2x)^2=1

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