under root coseca+1/coseca-1 - unde root coseca-1/coseca+1=2tanA
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√cosecA +1/√cosecA-1 - √cosecA -1/cosecA+1=2 tan A
l.h.s = by taking lcm
=√(cosecA-1)2 - (cosecA+1)2/cosec2A-1
=cosec2A -2cosecA+1 -(cosec2A+2cosecA+1 )/cosec2A
=cosec2A-2cosecA+1 -cosec2A -2cosec2 -1/cot2A
=2tan2A rhs
l.h.s = by taking lcm
=√(cosecA-1)2 - (cosecA+1)2/cosec2A-1
=cosec2A -2cosecA+1 -(cosec2A+2cosecA+1 )/cosec2A
=cosec2A-2cosecA+1 -cosec2A -2cosec2 -1/cot2A
=2tan2A rhs
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