How can I find the exact value of $\displaystyle cos\frac{\pi}{12} $ using the sum and difference identity?
I'm guessing I'd have to split the fraction up, into 2 parts, but I'm not sure on how to proceed.
Help appreciated.
How can I find the exact value of $\displaystyle cos\frac{\pi}{12} $ using the sum and difference identity?
I'm guessing I'd have to split the fraction up, into 2 parts, but I'm not sure on how to proceed.
Help appreciated.