Question

tan^-1 (1/2) + tan^-1 (1/3) = .....

(a) sin^-1 (1/√2)

(b) sin^-1 (1/2)

(c) tan^-1 (1/2) 

(d) tan^-1 (1/√3)

Answer 1

(a) sin^-1 (1/√2)

tan^-1(1/2) + tan^-1(1/3)