Projectile (1 Viewer)

[HoldingOn]

http://prntscr.com/k8nyt2

For part v I can find the first set of restrictions i.e. . But then the other solution to the quadratic is 71.33... how to I find the upper limit? Thanks

 

[integral95]

Use the equation in part iii)

Sub in x = 40 and y = 0 (instead of y = 20 like you did in part iv) )

Solve for theta and you'll get 15 (your lower limit) and 75 (the higher limit)