Q4 D of 126 Page 129

Prove that:


To Prove:


Formula Used:


1)


2) cosec2 A = 1 + cot2 A


3)


4)


Proof:


LHS


Let x = cot A


LHS


= cot-1(cosec A – cot A)







From (2), A = cot-1 x,



= RHS


Therefore, LHS = RHS


Hence proved.


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