please give me some tips and techniques to solve different problems in trigonometry. now i an in 10^th standard .i want to know what books are required to make my concepts strong in trigonometry . and also suggest me some ways to crack 10^th boards .

First, you should remember all the simple conversion of one trigonometric function to another.
You should memorise all the trigonometric identities.
Remember the principle domain of all the trigonometric function.
If you memorise these things, you can easily solve any trigonometric equation.
Books
NCERT
SL Loney – Trigonometry