If you're going to calculate the length of the arc in the first quadrant then simply use
Question 7
At first I thought it was polar co-ordinates but it was parametric so I used the arc length formula to try and find the length of the curve in ONE of the quadrants. I would later times this by 4 to get the length of the curve all together. So arc length =
so after lots of cancelling and using everybody's favourite trig identity sin^2(t) + cos^2(t) = 1 I get it down to
Okay now use a substitution of u = sint
to get but where are the limits I need to use to get this done? Can someone show me what the limits I need to use are?
Thanks
NOTE using t instead of theta