Polar and Rectangular coordinates?

Question

the polar coordinate is (-pi, -3pi/4).
convert the polar coordinate into rectangular form. Give an exact answer...



please help thank you ;)

Answer 1

x = -pi cos(-3pi/4)
= pi sqrt(2)/2
y = -pi sin(-3pi/4)
= pi sqrt(2)/2.

Answer 2

You've got a problem with your coordinates.

Polar coordinates consist of the magnitude and the angle relative to the +x axis. The magnitude always has to be positive. (hence Peter K's confusion)

As is, the negative sign changes the angle by pi radians (180 degrees or half a circle). The polar coordinates would be (pi,pi/4). The rectangular coordinates would be: (pi*sqrt(2)/2,pi*sqrt(2)/2)

Or, since the coordinates are not in the correct format, is it possible you meant (pi, -3pi/4)? If so, the only difference is both the x and y coordinates change sign.

Answer 3

ANS

x= 2.22144 (sqrt 2)(pi/2)
y= 2.22144 (sqrt 2)(pi/2)

Answer 4

You are missing the radius. You can not give any definite answer without the radius.