Unanswered Trigonometric Functions Questions

the positive values of a for which the equation [x+a]=sin(Ï€x/2) will have no solution is,where [.] denotes greatest integer function- a) (0,1); b)(1,2);c) (0,2);d) NOT. ...

Prove that: TanA + Tan(60+a) - Tan(60 -a) = 3Tan3A ...

Prove that : CotA + Cot(60+a) - Cot(60 -a) = 3Cot3A ...

Can anyone tell me where I can download the solutions to R.D. Sharma in pdf format? Thanks in advance. Please post the complete link. ...

If Tan A/2 = (Tan B/2)3 and Tan B = 2 Tan C then find (A + B)\C. ...

Help me with this. I need it urgently. And I want full solution ...