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Question

Find the value of (sinθ + cosθ)² + (sinθ – cosθ)².

A 4 Correct Incorrect

C 2 Correct Incorrect

D 1 Correct Incorrect

Detailed Solution

(sin θ + cos θ ) ² + (sin θ cos θ )² = sin² θ + cos² θ + 2 sin θ cos θ + sin² θ + cos² θ - 2 sin θ cos θ = 2 (sin² θ + cos² θ) = 2 (1) =2

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