# Thread: evaluate 23pi/6

1. ## evaluate 23pi/6

Don't use a calculator and use the rations in the reference triangle.
please explain in detail how you got it!

2. Originally Posted by thisisamazing
Don't use a calculator and use the rations in the reference triangle.
please explain in detail how you got it!
Do you understand that a "reference triangle" has angles between 0 and $\pi/2$? Also, that sine and cosine are periodic with period $2\pi$. Once you realize that, it is just elementary arithmetic. What is 23/6 as a mixed fraction?