" (3.) "cot^(-1)3+cosec^(-1)sqrt(5)=..........

4(cot^(-1)3+csc^(-1)sqrt(5))=pi

cot^(-1)9 + cosec^(-1)(sqrt(41)/4)=

Prove that : (i) tan^(-1) x + cot^(-1)( x+1) = tan^(-1) (x^(2)+x+1) (ii) cot^(-1) 3 + "cosec"^(-1) sqrt(5) = pi/4

The sum of the two angles cot^(-1) 3 and cosec^(-1) sqrt(5) is

cot^(-1)9+cosec^(-1)(sqrt(41))/(4)=(pi)/(4)

Find the principal value of each of the following: i) cot^(-1)(-sqrt(3)) ii) sec^(-1)(-sqrt(2)) iii) "cosec"^(-1)(-1) .

sin^(-1)(-(1/2))+cos^(-1)(-(1/2))+cot^(-1)(-sqrt3)+cosec^(-1)(sqrt2)+tan^(-1)(-1)+sec^(-1)(sqrt2) equals

Find the values of : (1) cos^(-1)((1)/(2))+tan^(-1)((1)/sqrt(3)) (2) cos^(-1)((1)/(2))+2sin^(-1) ((1)/(2)) (3) cosec ^(-1)(-sqrt(2))+cot^(-1)(sqrt(3)) .