Question

the angle of projection of a projectile which is projected with certain velocity from ground is pi by 8 with horizontal and its horizontal range is R. The angle with the horizontal for another projectile having same range R and speed is
1) 3pi/8
2)pi/4
3)pi/3
4)pi/6
kindly tell me how to solve this question

​

Answer 1

The correct answer to this question is option 1) 3π/8.

Given: The angle of projection of a projectile which is projected with a certain velocity from the ground is π/8 with horizontal and its horizontal range is R.

To Find: The angle with the horizontal for another projectile having the same range R and speed.

Solution:

We know that,

For any angle θ, another angle having the same speed would have the same projectile range will be 90° - θ.

Here,

θ = π/8

So,

90° - θ = π/2 - π/8                                             .........(180° = π, ∴ 90° = π/2)

          = 3π/8

Hence, the angle with the horizontal for another projectile having the same range R and speed is 3π/8.

Answer 2

Answer:

hope this helps

Explanation:

fact= Complementary anglles have same ranges