Another way to integrate -1 (x) (when -1 is integrable, of course) is to use integration by parts with u = -1

Another way to integrate ƒ^-1(x) (when ƒ^-1 is integrable, of course) is to use integration by parts with u = ƒ^-1(x) and dν = dx to rewrite the integral of ƒ^-1 as

compare the results of using Equations (4) and (5).

Equations (4) and (5) give different formulas for the integral of cos^-1 x:

a.

b.

5-100 [1-0x) dx -(x) dx = xf-(x) - [x ( a + 1-1(x) dx. dx (5)