Question

Finding the area of polar coordinates: One petal of r = cos 5 theta.

I know how to compute the area, I just need to check if I've got the correct limits. I got pi/2 and zero.

Answer 1

you only need area of 1 petal? does it matter which one

Answer 2

i think its 0 to pi

Answer 3

Its just one petal.

Answer 4

ok for 1 petal we need the limits to give r=0 or cos(5x) =0
cos is 0 when angle is n*pi/2, n is odd
5x = pi/2 --> x = pi/10
5x = 3pi/2 --> x = 3pi/10

i think you limits should be pi/10 to 3pi/10