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∫2/3 sec x + 2 sin x dx = A ln(sin x - coxx + 2/sin x - cosx - 2) + B tan-1(sin x + cos x/√2) + C then value of 1/A + 1/B2 is

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∫2/3 sec x + 2 sin x dx = A ln(sin x - coxx + 2/sin x - cosx - 2) + B tan-1(sin x + cos x/√2) + C then value of 1/A + 1/B2 is

(A) 2  (B) 5  (C) 6  (D) 4 

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Correct option (C) 6

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