∫(sec-¹x + coses-¹x)dx =

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Q-: ∫(sec-¹x + coses-¹x)dx =
(A) π/2 + x + k
(B) πx/2 + k
(C) π/2x + K
(D) 0
Answer -: πx/2 + k 

Hints-: sec-¹x + coses-¹x = π/2

 

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