Question

Without using a calculator, choose the point on the terminal side of theta. (I don't have the theta on my keyboard)
theta=5pi/4
and
evaluate without using a calculator.
sin theta, if cos theta= 2/5 and tan theta<0

Answer 1

find \(\frac{5\pi}{2}\) on the unit circle on the last page of the attached cheat sheet
then look at the corresponding point
the first coordinate is cosine, the second coordinate is sine

Answer 2

Thanks!