Let \( \theta\) be an angle so that \(\sin(\theta) = 4/5\)\(\)
and \(\cos(\theta) =3/5\). If that's the case, what are \(\cos\left(\theta - \pi\right), \cos\left(\theta - \frac{\pi}{2}\right)\)in that order?
cos (theta - pi) = -3/5 and cos (theta - pi/2) = -4/5.
