The initial speed doesn’t matter. To reach the maximum height, you need to launch straight up ... 90 degrees above horizontal.
Answer:
90 degree
Explanation:
The height for the projectile motion is given by
H = u^2 Sin^2 theta/ 2g
Height is maximum when sin theta is maximum.
Sin theta is maximum when it's value is 1.
So the value of theta is 90 degree.
