Tuesday

March 31, 2015

March 31, 2015

Posted by **Ama** on Sunday, October 28, 2012 at 11:55am.

sin 2θ + sin θ = 0

- precalculus -
**Steve**, Sunday, October 28, 2012 at 12:21pmsin2x = 2sinx cosx

so, you have

2sinx cosx + sinx = 0

sinx (2cosx+1) = 0

you should be able to sort that out easily, looking for values where

sinx=0 or cosx = -1/2

- precalculus -
**Ama**, Sunday, October 28, 2012 at 1:07pmIf a projectile is fired with velocity v0 at an angle θ, then its range, the horizontal distance it travels (in feet), is modeled by the function

R(θ) =

v02 sin 2θ

32

.

If

v0 = 2600 ft/s,

what angle (in degrees) should be chosen for the projectile to hit a target on the ground 5000 ft away? (Enter your answers as a comma-separated list. Round your answers to three decimal places.)

Thanks.

**Answer this Question**

**Related Questions**

precalculus - Solve the given equation. (Enter your answers as a comma-separated...

calculus - Solve the given equation. (Enter your answers as a comma-separated ...

precalculus - Solve the given equation. (Enter your answers as a comma-separated...

precalculus - If a projectile is fired with velocity v0 at an angle θ, then...

pre-calc help - Solve the given equation. (Enter your answers as a comma-...

precalculus - Find all solutions of the given equation. (Enter your answers as a...

precal - Solve the given equation. (Enter your answers as a comma-separated list...

precal - Solve the given equation. (Enter your answers as a comma-separated list...

precal - Solve the given equation. (Enter your answers as a comma-separated list...

Trigonometry - Use inverse trigonometric functions to find the solutions of the ...