Saved Bookmarks
| 1. |
Differentiate.(cos 3x-cosx)/(cos5x-cos3x) |
|
Answer» Solution :`y=(cos3x-cosx)/(cos5x-cos3x)=(-2sin2xcdot sinx)/(-2sin4xcdot SIN2X)` `=(sin2x)/(SIN4X)=1/(2cos2x)` `=1/2sec2x` `thereforedy/dx=1/2sec2xcdottan2xcdot2` `=sec2x TAN 2x` |
|