Prove that: (sec A - tan A)? (1 + sin A) = 1 - sin A
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Step-by-step explanation:
(secA-tanA)²(1+sinA)
={(1-sinA/cosA)²}(1+sinA)
=(1-sinA)²(1+sinA)/cos²A
=(1-sinA)²(1+sinA)/(1+sinA)(1-sinA)
=1-sinA
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