a person rowing at the rate of 5 km/h in still water , takes thrice as much as time in going 40km upstream as in going 40 km downstream . find the speed of the stream. faster frnd itsss really important.
which are two most important forces to keep a satellite move in a circular orbit around earth is that 1 . CENTRIPETAL AND GRAVITAIONAL 2. CENTRIPETAL AND CENTRIFUGAL 3. CENTRIFUGAL AND GRAVITATIONAL
Solve the following and also tell why cos(-2x) has changed to cos(2x) int he following--- 2sin4xcos(-2x)+2sin4x
Using the properties of sets prove that (A-B) U B = AUB