
First of all, we use the formula of an Area of a Curve.
The formula is \(A = \int_a^b \frac{1}{2} r^2 d\theta\).
You substitute \(r = \sqrt{2\theta}\) , \(0 \le \theta \le \frac{\pi}{2}\) into \(r\).
You proceed to simplify it until it is fully simplified and simply take the integral and you will get the answer.
