# Math Help - Help with area enclosed by curve

1. ## Help with area enclosed by curve

x(t) = cos t and y(t) = sin t cos t.

I know that by symmetry, I just take 4 times the area in the first quadrant.
4 {integral 0 to pi/2} f(t)dt
But I don't know how to set up the function.

2. $\sqrt{\left( \frac{dx}{dt} \right)^{2}+\left( \frac{dy}{dt} \right)^{2}}.$