prove that sin^2A . sec^2A + sin^2 . cosec^2A = sec^2A
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Step-by-step explanation:
LHS = sin²A . sec²A + sin² . cosec²A = sin²A ( sec²A + cosec²A)
= sin²A ( co²A + sin²A) / sin²Acos²A = 1/cos²A = sec²A = RHS
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