### Trigonometry Plan Questions

A) Give the vale of : (i) sin^-1 (cosx ), only acute angle. (ii) tan (sin^1 x) (iii) tan [ tan^-1 ( x+ 1)/(x-1) + tan ^-1 (x-1 )/x b) Solve : cos^-1 x + cos^-1 2x = 60° c)State what is the most interesting thing learnt in studying Trigonometry and why you have select it to be introduced in your