Question

a point (a,b) shown I'm the below graph in the polar coordinates is given . Convert the point to rectangular coordinates

Answer 1

we have that

(3,-pi)

x=rcos(theta)------> x=3cos(-pi) -----> x=-3

y=rsin(theta) ------> y=3sin(-pi) -----> y=0

the answer is

(-3,0)