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SinA/1+cosA + 1+CosA/SinA = 4 |
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Answer» Step-by-step EXPLANATION: sinA/1+cosA + 1+cosA/sinA=4 sin²A+(1+cosA)²/sinA(1+cosA)=4 sin²A+1+cos²A+2cosA/sinA(1+cosA)=4 2+2cosA/sinA(1+cosA)=4 2/sinA=4 2cosecA=4 cosecA=2 A=30° |
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