Question

Why cant anybody help me with polar graph??

Answer 1

because you didn't ask any specific question

Answer 2

Why is the range from -pi/4 to pi.4 for the graph of r^2=36cos2(theta)

Answer 3

r^2= 36 cos[theta]^2

same as

r= 6 cos[theta]

Answer 4

then what?

Answer 5

this is just a circle

Answer 6

but how do i graph it?

Answer 7

think
r=6 cos[theta]

when it is horizontal
cos[0]=1
r= 6 cos[0]= 6

r is 6 when horizontal

Answer 8

so theta -pi/4 to pi/4 would only include the right half

Answer 9

Hey, can graph the this just using: and then just plot points