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tan-1-2-tan-1-3-cosec-1-x-then-x-is-equal-to-a-4-b-2-d-2-d-none-of-these-

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Question Number 39337 by LX Z last updated on 05/Jul/18
tan^(−1) 2 + tan^(−1) 3=cosec^(−1) x ,then x is equal to (a) 4 (b) (√2) (d) −(√2) (d) none of these
tan−12+tan−13=cosec−1x,thenxisequalto(a)4(b)2(d)−2(d)noneofthese

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