

InterviewSolution
Saved Bookmarks
1. |
Evaluate `int(tanx dx)/(sqrt(2+3tan^(2)x)).` |
Answer» `int(tanx dx)/(sqrt(2+3tan^(2)x))=int(sinx dx)/(sqrt(2cos^(2)x+3sin^(2)x))` `=int(sinx dx)/(sqrt(2cos^(2)x+3(1-cos^(2)x)))` `=int(sinx dx)/(sqrt(3-cos^(2)x))` `=-int(dt)/(sqrt(3-t^(2)))` `=-"sin"^(-1)(t)/(sqrt(3))+c` `=-"sin"^(-1)(cosx)/(sqrt(3))+c` |
|