1. The problem statement, all variables and given/known data A projectile is launched from an origin (0cm,0cm) on a tilted plane. The plane makes 30 degrees with the horizontal. The launcher sends the ball with a speed of 0.2m/s. At what angle should the projectile be launched to hit the target at (0.7m,0.6m) location? Assume there are no resistive forces to the projectile motion in this plane. 2. Relevant equations r_f = r_i + v_i*t + 1/2at2 Breaking the velocity vector into it's x and y components: v_y = vsinΘ v_x = vcosΘ 3. The attempt at a solution In the x-direction: There is no acceleration in the x direction, so the above equation is reduced to: x_f - x_i = vcosΘ*t 0.6 = vcosΘt t = 0.3 / cosΘ (EQUATION 1) In the y-direction: y_f - y_i = vsinΘt - 4.9t2 0.7 = vsinΘt - 4.9t2 (EQUATION 2) SUB EQUATION 1 INTO 2 0.7 = 0.2sinΘ (0.3/cosΘ) - 4.9(0.3/cosΘ)2 This is where I get stuck... solving the trigonometric equation. I can't find a solution, so I'm thinking that my above reasoning may be wrong. Either that, or I am just having an incredibly hard time with trig -- which I've been out of practice for 8 years. Any suggestions / guidance is very much appreciated.