Question

Please answer. Convert the polar equation θ = 3 π/4 to a Cartesian equation.

a. y= x
b. y= -x
c. y= 3π/4x
d. y= 3π/4

Answer 1

\[x=\cos\theta=-1/\sqrt{2}\]\[y=\sin\theta=1/\sqrt{2}\]
Then,
\[y=-x\]