4 4. (9 pts) Given a right triangle having an acute angle 0 of 12 and an adjacent side of length 21.0, find the measurement of the other angle and the other sides. Show work. Be sure to clearly identify which of your answers is the length of the side opposite to and which is the length of the hypotenuse, as well as stating the measure of the other acute angle. Report the lengths rounded to one decimal place. 5. (7 pts) Use a sum or a difference identity to find the exact value of sin (285). Show work.