1 (1-cosA)÷1 (1+cosA)
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Answer:
2 cosec^2A
Step-by-step explanation:
1/1+cosA + 1/1-cosA
=1-cosA+1+cosA/1^2 - cos^2A
=1-cosA+1+cosA/1 - cos^2A
=1-cosA+1+cosA/sin^2A
=2/sin^2A
=cosec^2A
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