(sec A + tan A) (1- sin A) = ?
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Answer:
(sec A + tan A) (1-sin A) = cos A
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Step-by-step explanation:
(secA + tanA) (1 - sinA)
= (1/cosA + sinA/cosA) (1 - sinA)
1 + sinA
= -------------- × 1 - sinA
cosA
= 1 - sin²A
------------
cosA
= cos²A/cosA
= cosA
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