If tanA = a tanB and sin A = b sinB,then prove that cos^2 A = b^2 - 1 – InterviewSolution

1.	If tanA = a tanB and sin A = b sinB,then prove that cos^2 A = b^2 - 1 / a^2 - 1.
Answer» If tanA = a tanB and sin A = b sinB,then prove that cos^2 A = b^2 - 1 / a^2 - 1.

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