can someone please solve this and give explanation...
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cosecA/cosec-1 + cosecA/cosec+1
= cosec2A + cosecA + cosec2A - cosecA / cosec2A- 12 ( cross multiply)
= 2cosec2A / cosec2A-1
= 2( 1 + cot2A) / (1 + cot2A) -1
= 2 + 2cot2A / cot2A
= 2/cot2A + 2 (1 / cot2A = tan2A)
= 2tan2A + 2 = RHS
Hope it helps!!
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