Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Range is maximum at θ = 45º.
Reason (R): Range is maximum when sin (2θ) = 1.
In the light of the above statements, choose the correct answer from the options given below:

• A. Both assertion (A) and reason (R) are true & reason (R) is the correct explanation of assertion.
• B. Both assertion (A) and reason (R) are true but reason (R is not correct explanation of assertion.
• C. Assertion (A) is true and reason (R) is false.
• D. Assertion (A) is false and reason (R) is false.

Answer 1

Answer: (A)

Both assertion (A) and reason (R) are true & reason (R) is the correct explanation of assertion.

Answer 2

The correct option is(A): Both assertion (A) and reason (R) are true & reason (R) is the correct explanation of assertion.

$R=\frac{u^{2}sin(2\theta)}{g}$
For the Rmax
$sin(2\theta)=1$
$sin(2\theta)=90^{o}$
$\theta=45^{o}$