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Show thatsin2 A cos? B -sin2 A sin2 B sin2 A - cos B. |
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Answer» sin^(2)Acos^(2)B-cos^(2)Asin^(2)B= sin ^2 A(1- sin ^2 B) - cos^(2)Asin^(2)B= sin ^2 A - sin ^2 A sin ^2 B - cos^(2)Asin^(2)B= sin ^2 A - sin ^2 B(sin ^2 A + cos ^2 A)= sin ^2 A - sin ^2 B |
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