`2tan^(-1)(-2)` is equal to (a)`-cos t^(-1)((-3)/5)` (b) `-pi+cos^(-1)3/5` (c)`-pi/2+tan^(-1)(-3/4)` (d) `-picot^(-1)(-3/4)`

cos^(-1)((3)/(5))+cos^(-1)((4)/(5))=(pi)/(2)

tan(cos^(-1)((4)/(5))+tan^(-1)((2)/(3)))=

Prove that: sin^(-1)(-(4)/(5))=tan^(-1)(-(4)/(3))=co^(-1)(-(3)/(5))-pi

tan^(-1)sqrt(3)-sec^(-1)(-2) is equal to (a) (B) (B) (C) (D) quad (2 pi)/(3)

tan [cos^(-1)((4)/(5)) +tan ^(-1)((2)/(3))]=....

If |z-25i|le15 , then |maximum arg(z) - minimum arg(z)| equals (A) (pi)/(2)+cos^(-1)((3)/(5)) (B) sin^(-1)((3)/(5))-cos^(-1)((3)/(5)) (C) 2cos^(-1)((4)/(5)) (D) 2cos^(-1)((1)/(5))

COS (tan ^ (-1) (3) / (4)); cos ^ (-1) (cos5 (pi) / (4))

Prove that : tan^(-1)(1/2) + tan^(-1)(1/3) = tan^(-1)(3/5) + tan^(-1)(1/4) = pi/4

Find the value of: i) sin^(-1)(sin (2pi)/3)) , ii) cos^(-1)(cos(7pi)/6) , iii) tan^(-1)(tan(3pi)/4)

Evaluate following 1. sin(cos^(-1) 3//5) 2. cos(tan^(-1)3//4) 3. sin(pi/2-sin^(-1) (-1/2))