Question

Prove:- sin^2A-cos^2B=sin^2B-cos^2A
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Answer 1

Explanation:

1: change 'sin²A' and 'cos²B' into (1-cos²A)and (1-sin²A) respectively.

2:open the brackets and put signs accordingly.

3: cancel (-1) and (+1).

4: remaining is your answer.