How can I be excellent in trigo. and learn all the formulas as that topic in my coaching class is abt to over in few datys. Is there any another method instead of learning the formulas so that I can be able to tackle every problem like my mathematics sir?

the best way to remeber all formulas is as follows.

(1) Derive the proofs of all formulas without help from book

(2) Practice as many problems as possible. 

(3) Write down all formulas in a chart paper or small cards and stick them to wall. Everytime you solve a problem refer to chart for formula.

@ amit 
Yes , trigonometry are very intresting subject , u just need to take intrest in that subject , here i am suggesting few methods to strong the trigonometry 
1- learn the mnemonics , as most of the trigometric ratio and formula are based upon that only . 
2- learn that angle dependence table with proof , that is the most important one . 

3- take out your ncert and r d sharma , and practice as many examples as u can . 
4- everyday recap these formula as they have a high probability of getting forget . 
5- learn out the tricks and tips to solve the problems efficiently,, the shortcuts are avaliable with askiitian self study package . 
6- always make diagrams while doing the calculation , that will minimise your chance of error . 
7- last but not the least , practice will help u to tackle these subject , and they also have a wide range of application in higher classes 
in integration , calculus , permutation combination etc . 
SO, LEARN AND BUILT A STRONG FOUNDATION IN TRIGO. THATS VERY IMP TOPICS IN MATHS THAN OTHER TOPIC . 
ALL THE BEST ..