Question

Need help Finding the point on the terminal side of theta= -3pi/4 that has an x coordinate of -1.

Answer 1

the x coordinate is -1, and so the y coordinate must be the same

Answer 2

@satellite73 how do you know that y must be the same

Answer 3

the triangle i drew has one right angle and two other angles that are both \(\frac{\pi}{4}\) radians
since both angles are the same,it is an equilateral triangle, i.e. both sides are the same length

Answer 4

the x coordinate of -1 means you went to the left 1 unit
so the y coordinate must also be -1 , i.e. down 1 unit