Question

Evaluate the integral using the substitution rule. (Use C for the constant of integration.)

Integration of sec5(2x) tan(2x) dx

Answer 1

try \(u=\sec(2x)\)

Answer 2

you get it almost immediately
\[u=\sec(2x),du=2\sec(2x)\tan(2x)dx\]
\[\frac{1}{2}\int u^4du\] etc

Answer 3

i was using sec^2(x) =u as my substitute. i came close but i got left with a tan2x. as for yours, thank you! but shoulding the u^4 be u^5?

Answer 4

you are right. :P