The maximum horizontal range is obtained when _________.
Step 1: Write the equation and define the variables in the equation.
We know, horizontal range is given by the equation,
where,
Since is constant for all the given angles, the range is maximum when is maximum.
Step 2: Explanation for correct option:
In case of Option A
when ,
is maximum when is
i.e., when
Option A, is the correct answer.
Step 3: Explanation for incorrect options:
In case of Option B
when ,
Option B is incorrect because
Option B is incorrect
In case of Option C
when ,
Option C is incorrect because
Option C is incorrect
In case of Option D
when ,
Option D is incorrect because
Hence, correct option is (A).