(1-sinA+cosA)²=2(1+cosA)(1-sinA)
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Step-by-step explanation:
( 1 - SinA + CosA )²
{(1 + CosA) - SinA }²
(1+CosA)² + Sin²A - 2SinA(1+CosA)
( 1 + Cos²A + 2CosA + Sin²A ) - 2SinA(1+CosA)
2(1 + CosA) - 2SinA(1 + CosA)
2(1 + CosA)(1 - SinA)
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