Physics problem... Maths related..

[K-PRO]

ok i wud but why is y = 0 ?
at the start and end it would be 0 yes when t = 0 as well .... but how do i find the heighest point
and eventually solve to get the equation of the curve...

i have tried to solve with these values taking V0 = 10 and XT = 7
and solving the 1st equation would be like this when substituting the values
7 = 10 * cos θ * 0
which is gonna give me when solving for θ
7/0 = cos θ
and which is goin to give me 90 for θ
and thats a constant answer which is impossible to be because a cannon is not firing upwards....


thank you for ur quick response