ii) sec A1-sin A)(sec A+ tan A) = 1
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1/cosA(1-sinA)(1/cosA+sinA/cosA)
1 - sin a by Cos A 1 + sin a by Cos A
1 square minus sin square A by cos squareA
1 - sin squared by sin squared by cos squared
cos square A by cos square equals to 1 l is equals to
Thus LHS=RHS
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