2 / x \ _________ a *asin|---| / 2 2 \|a|/ x*\/ a - x ------------ + -------------- 2 2
0.5*x*(a^2 - x^2)^0.5 + 0.5*a^2*asin(x/|a|)
_________ / 2 2 2 / x \ x*\/ a - x + a *asin|---| \|a|/ ----------------------------- 2
_________ / 2 2 2 / x \ x*\/ a - x + a *asin|---| \|a|/ ----------------------------- 2