If tan^2a = cos^2B - sin^B, prove that cos^2a - sin^2a = tanB.
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IF cos2A-sin2b=tan2A prove that cos2A-sin2A=tan2b. 2 ... cos²A - sin²A = tan²B , then prove , cos²B - sin²B = tan²A. Given ...
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you did mistake in typing question is cos²A - sin²A = tan²B , then prove , cos²B -
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