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Number of solutions to the equation 2tan-1(cos x) = tan-1(2cosec x) in the interval (-2π, 2π) is

(A) 4

(B) 3

(C) 7 

(D) No solution

1 Answer

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by (41.7k points)
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Best answer

Correct option (A) 4


⇒ cosec x = 0 which is not possible, and

cotx = 1 which has 4 solutions. 

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