if sinA+2cosA=1 then 2sinA-cosA =?
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sinA + 2cosA = 1
sinA = 1 - 2cosA .........eq(1)
2sinA - cosA = 2(1-2cosA) - cosA = 2 - 4cos A - cosA = 2 - 5cosA
sinA = 1 - 2cosA .........eq(1)
2sinA - cosA = 2(1-2cosA) - cosA = 2 - 4cos A - cosA = 2 - 5cosA
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2-5cosA is the answer of the
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answer is 2
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