1.

cosec A by cosecA-1 +cosecA by cosecA +1 =2+2 tan sq. A =2sec A

Answer» CosecA/CosecA-1 + CosecA/CosecA+1 = 2+2tan²A = 2Sec²ATry solving now..If you still don\'t get then ping me I\'ll send you the solution
Its very easy.But at last you\'ve written (=2SecA) it should be (=2Sec²A)


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