Question

Help please,
give rectangular coordinates for the points(-5,2pi/3)

Answer 1

Assuming those are polar coordinates
you can use the conversion equations
x = r cos Θ
y = r sin Θ
x = (-5) cos(2pi/3)
y = (-5) sin (2pi / 3)

Answer 2

oh so x= 5/2 and y = -5sqrt(3)/2 ?

Answer 3

correct

Answer 4

thanks :)