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tanA/secA-1 + tanA/secA+1 = 2 cosecA

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tanA secA + tanA + tanA secA – tanA / (secA-1)( secA+1)
= 2 tanA secA / sec2A -1
= 2 tanA secA / tan2A
= 2 secA/ tanA
= 2 cosA/ sinA * cosA
= 2 / sinA = 2 cosecA
Prove Kijiye ki tanA/secA-1+tanA/secA+1=2cosecA
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