1.

Express each of the following as the sum or difference of sines and cosines:(i) 2 sin 3x cos x(ii) 2 cos 3x sin 2x(iii) 2 sin 4x sin 3x(iv) 2 cos 7x cos 3x

Answer» Express each of the following as the sum or difference of sines and cosines:

(i) 2 sin 3x cos x

(ii) 2 cos 3x sin 2x

(iii) 2 sin 4x sin 3x

(iv) 2 cos 7x cos 3x


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