`2cot^-1 7+cos^-1 (3/5)` is equal to (A) `cot^-1 (44/117)` (B) `cosec^-1 (125/117)` (C) `tan^-1 (44/117)` (D) `cos^-1 (44/125)`

cot(cosec ^(-1)(5/3) + tan^(-1)(2/3))=

cot[csc^(-1)(5/3) + tan^(-1)(2/3)] = ....

The value of 2tan^(-1)(cos ec tan^(-1)x-tan cot^(-1)x) is equal to (a)cot ^(-1)x( b ) (cot^(-1)1)/(x) (c)tan ^(-1)x (d) none of these

Cosec(2Cot^-1(5) + Cos^-1(4/5)) is equal to

The value of cot ( cosec^(-1) 5/3 + tan^(-1). 2/3) is

sec^(2) ( tan^(-1)2) + cosec^(2) ( cot^(-1)3) =

sec^(2)(tan^(01)2)+csc^(2)(cot^(-1)3) is equal to 5 (b) 13 (c) 15 (d) 6

If A = 1/1 cot ^(-1) (1/1) + 1/2 cot^(-1) (1/2) + 1/3 cot ^(-1) ( 1/3) " and " B = 1 cot^(-1) ( 1) + 2 cot^(-1) (2) + 3 cot^(-1) (3) " then " |B - A| " is equal to " (api)/b + c/d cot ^(-1) (3) where a,b,c,d in N are in their lowest form , find ( b -a - c - d)

(1+tan^(2)A)/(1+cot^(2)A) is equal to sec^(2)A(b)-1(c)cot^(2)A(d)tan^(2)A