Saved Bookmarks
| 1. |
\operatorname { cosec } ^ { 4 } x - \operatorname { cosec } ^ { 2 } x = \operatorname { cot } ^ { 4 } x + \operatorname { cot } ^ { 2 } x |
|
Answer» cosec^4 x- cosec^2 x = ( cot^2 x + 1 )^2 - (cot^2 x +1)= cot^4 A + cot^2 A |
|