Question

find the integral of sqrt(1-x^2) dx

Answer 1

\[\int\limits_{}^{}\sqrt{1-x ^{2}} dx\]

Answer 2

i can substitute 1-x^2 with 1-sin^2 theta

Answer 3

it gives me.... cos^2 theta
then sqrt of that is cos theta

Answer 4

yes wat about dx

Answer 5

then the dx is cos theta

Answer 6

okie looks good

Answer 7

that gives me integral of cos ^2 theta d theta

Answer 8

cos^2 theta is 1/2(1+cos 2theta)

Answer 9

integral of that is 1/2 theta + 1/4 sin 2 theta