Prove sin(a+b)sin(a-b)=sin^2a-sin^2b

If you know that sin (a+b) will sina cosb + cosa sinb and sin(a-b) will be sina cosb - cosa sinb, this to prove the equation will not be difficult. You should know also cos^2 = (1-sin^2)

Vinod Kumar

Educator

Prof. Vinod Kumar is an Indian Educator, Motivational Speaker, Naturopathic Practitioner and Entrepreneur . He is the founder of Svtuition... read more »

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