# Trigonmetric general solutions question

• September 9th 2011, 06:56 AM
aonin
Trigonmetric general solutions question
I'm not sure how to solve using general solutions $\sin{3\theta}=3\sin{\theta}$
• September 9th 2011, 07:06 AM
Prove It
Re: Trigonmetric general solutions question
Quote:

Originally Posted by aonin
I'm not sure how to solve using general solutions $\sin{3\theta}=3\sin{\theta}$

Start by simplifying the LHS using the identity $\displaystyle \sin{3\theta} \equiv 3\sin{\theta} - 4\sin^3{\theta}$.