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SinA by 1 ➕ cosA ➕ sinA by 1 ➖ cosA |
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Answer» Step-by-step EXPLANATION: sinA/1+cosA + sinA/1-cosA =sinA[1/1+cosA+1/1-cosA] =sinA[1-cosA+1+cosA/1-cos²A] =sinA[2/sin²A] =2/sinA =2cosecA |
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