hello sir, I just wanted to know the derivations of all the trigonometric formulae which is in our syllabus class 11th. That is, product to sum & sum to product and all such formulae...thanks!

Asked by Lochana Jayachandran | 17th Jul, 2013, 09:44: PM

Expert Answer:

You would not like to derive any of those formulas in your exam. Memorize them somehow, that would be best for you. Else you will just keep deriving these formulas in the exam and not solve any questions. 
To memorize them, write them all on a chart paper and paste in your room or above your study table, where you will be able to see them daily. Also, you should practice a lot of questions. The more you practice, the more is the chance that you will remember them. 

Answered by  | 18th Jul, 2013, 09:35: AM

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