Question #985ea Calculus Techniques of Integration Integration by Parts 1 Answer Jim H Jul 24, 2017 We can't use the #x^n# rule because this integrand is not of the form #x^n#. Explanation: If you think that you have a way of writing #sqrt(1-x^2)# as #x^n# for some power #n#, you have made an algebra error. Answer link Related questions How do I find the integral #int(x*ln(x))dx# ? How do I find the integral #int(cos(x)/e^x)dx# ? How do I find the integral #int(x*cos(5x))dx# ? How do I find the integral #int(x*e^-x)dx# ? How do I find the integral #int(x^2*sin(pix))dx# ? How do I find the integral #intln(2x+1)dx# ? How do I find the integral #intsin^-1(x)dx# ? How do I find the integral #intarctan(4x)dx# ? How do I find the integral #intx^5*ln(x)dx# ? How do I find the integral #intx*2^xdx# ? See all questions in Integration by Parts Impact of this question 1183 views around the world You can reuse this answer Creative Commons License