Homework Help: Calc

Posted by Jessica on Wednesday, March 26, 2008 at 1:18am.

Find the cartesian coordinates of the following points given in polar coordinates.

b. (2 rt2, 3pi/4)

I cant figure this one out

Calc - drwls, Wednesday, March 26, 2008 at 5:37am
I don't know what they call the radius 2 rt2.
Whatever the polar-coordinate radius is, multiply it by cos 3pi/4 to get x and sin 3pi/4 to get y.

cos 3pi/4 = cos 135 degrees = -1/(sqrt 2)
sin 3pi/4 = sin 135 degrees = 1/(sqrt 2)

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