Question

Find the point on the terminal side of θ = -3 pi/4 that has an x coordinate of -1.

Answer 1

this should be the point on the unit circle with an angle of -3pi/4

you have the x-coordinate (-1) so you only need the y-coordinate

the y-coordinate is the sin of the angle

since -3pi/4 is in the third quadrant, y=-sin(pi/4)

Answer 2

hold on let me check