1.7 Integrals Resulting in Inverse Trigonometric Functions [STARTS AT 6:05] PROFESSOR: All right, so this one, we have got a is 3. u is x. So really, we don't have to do the whole chain rule idea. We can just say this looks like dx over square root of 3 squared minus x squared. And since that's in the form of arcsine, u/a plus C. [ENDS AT 6:44]