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cos^(-1) ab+1/a-b +cos^(-1) bc+1/b-c cot^(-1) ca+1/c-a =

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0 votes
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in Trigonometry by (16.0k points)

cos-1 \(\frac{ab + 1}{a-b}\) + cos-1 \(\frac{bc + 1}{b-c}\) + cot-1 \(\frac{ca + 1}{c-a}\) =

(a) 0

(b) 2

(c) π/4

(d) -1

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1 Answer

+1 vote
by (16.6k points)

Correct option is (a) 0

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