Saved Bookmarks
| 1. |
\operatorname st \theta - \operatorname tan \theta = \frac 2 \operatorname cos ^ 2 \theta - 1 \operatorname sin \theta \operatorname cos \theta |
|
Answer» Let theta = xLHS:=cot x - tan x=cos x/sin x - sin x/cos x=(cos^2 x - sin^2 x)/sin x.cos x=[cos^2 x - (1 - cos^2 x)] / sin x. cos x= 2cos^2 x - 1/sin x. cos x= RHS Hence proved |
|