InterviewSolution
Saved Bookmarks
| 1. |
Solve: cos5x . cos(x5). |
|
Answer» Let y = cos5x . cos(x5) \(\frac{dy}{dx}\) = cos5x(-sin(x5)5x4) + cos(x5).5cos4x.(-sinx) = – cos5x sin(x5) 5x4 – 5 cos(x5) . cos4x . sinx |
|