Math  /  Trigonometry

Questionsin2θ+2cos2θ1=cos2θ\sin ^{2} \theta+2 \cos ^{2} \theta-1=\cos ^{2} \theta

Studdy Solution
Since the equation cos2θ=cos2θ\cos^2 \theta = \cos^2 \theta is an identity, it holds true for all values of θ\theta.
Therefore, the solution to the equation is:
θR\theta \in \mathbb{R}

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