Verity the identity. sin(x + y)cos(x – y) = sin x cos x + sin y cos y Working with the left-hand side, use a Product-to-Sum Identity, and then simplify. LHS - sin(x + y)cos(x – y) -글 (sin(x + y +x-y) + Use the Double-Angle Identities as needed, and then simplify. L내S-글 (2(sin x)( (cos sin x cos x +

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