Prove that: \; (1+ θ)²+(1- θ)²/2² θ = ² θ + ...

ICSE Class X Math 2022 Paper

Question : 25 of 30

Marks: +1, -0

Prove that:

\; \frac{(1+\sin \theta)^2+(1-\sin \theta)^2}{2\cos^2 \theta} = \sec^2 \theta + \tan^2 \theta

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