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Q.

If A is not an integral multiple of π2 , then cosec2A + cot2A =

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a

cot A + 2cot 2A

b

tan A + 2cot 2A

c

tan 2A

d

tan A

answer is C.

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Detailed Solution

  cosec2A+cot2A =1+tan2A2tan A+1-tan2A2tan A =1+tan2A+1-tan2A2tan A =22tan A=cot A

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