I need the sin and cos of (3pi/4)

Find the reference angle, the quadrant of the terminal side, and the sine and cosine of 37 Enter the exact answers. The terminal side of the angle 37 lies in quadrant For the number 7 , either choose 7 from the drop-down menu (under o) or type in Pi (with a capital P). sin (a) OO 0.785 Its reference angle is sin (a) OO ? 0.07 sin 4 = sin (a)