Find integration of tan^3 3x sec^4 3x dx?
2 Answers
Aug 22, 2017
Explanation:
using some trignometric formulae
Aug 22, 2017
Explanation:
Another answer sows how to get
We can use
# = int tan^3 3x (tan^2 3x + 1) sec^2 3x dx#
# = int (tan^5 3x + tan^3 3x) sec^2 3x dx#
# = int (tan^5 3x) sec^2 3x dx + int (tan^3 3x) sec^2 3x dx#
# = 1/3 (tan^6 3x)/6 + 1/3 (tan^4 3x)/4 +C#
# = (tan^6 3x)/18 + (tan^4 3x)/12 +C#