SecA (I- sin A) (secA+ tan A) = 1
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Answer:
LHS=
=1/cosA(1-sinA) (1/cosA+sinA/cosa)
=1/cosA(1-sinA) (1+sinA/cosA)
=(1-sin²A) (1/cos²A)
=Cos²A/cos²A = 1 = RHS
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