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

1.	tanA/1+secA-tanA/1-secA=2cosecA
Answer» LHS = tanA/1+secA-tanA/1-secA = tanA-tanAsecA-(tanA+tanAsecA)/1^2-sec^2 = -2tanAsecA/-tan^2 [tan^2+1=sec^2] = 2secA/tanA =2cosecA

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