SOLUTION: Find the Cartesian equation of θ = 3π/4

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Find the Cartesian equation of θ = 3π/4      Log On


   

Question 1119694: Find the Cartesian equation of θ = 3π/4
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
theta=3pi%2F4

Take tangents of both sides

tan%28theta%29=tan%283pi%2F4%29

tan%28theta%29=-1

Use this picture:

 

y%2Fx=-1

y=-x

Edwin