Draw a picture of the four-leaved rose whose equation in polar coordinates is r = cos(2). Let

Draw a picture of the “four-leaved rose” whose equation in polar coordinates is r = cos(2θ). Let θ go from 0 to 2π in 100 steps. Each time, compute r and then compute the (x, y) coordinates from the polar coordinates by using the formula 

x = r · cos(θ), y = r · sin(θ)