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tan^-1(tan4) + cot^-1(cot4) equals (A) 8 (B) π - 8

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tan-1(tan4) + cot-1(cot4) equals

(A) 8

(B) π - 8

(C) 8 - 2π

(D) 0 

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Best answer

Correct option (C) 8 - 2π

Explanation:

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