Projectile motion: finding angle

[shoust00]

Homework Statement

The free throw line in basketball is 4.57 m (15ft) from the basket, which is 3.05m (10ft) above the floor. A player standing on the free throw line throws the ball with an initial speed of 7.15 m/s, releasing it at a height of 2.44m (8ft) above the floor. At what angle above the horizontal must the ball be thrown to exactly hit the basket?

Homework Equations

I think i will use
sin(2theta)= Rxg/iv

The Attempt at a Solution

I am not sure where to start with this problem

 

[Spinnor]

You will need the following equations and know how to use them,

x = x_i + v_ix*t
y = y_i + v_iy*t + a*t^2/2

See:

http://www.ux1.eiu.edu/~cfadd/1350/04TwoDMtn/proj.html

http://www.google.com/search?hl=en&...&biw=800&bih=417&bav=on.2,or.r_gc.r_pw.&cad=b