Choose the correct answer in the the area bounded by the \(y\) - axis, \(y = \cos\: x\) and \(y = \sin\: x\) when \(0 \leq x \leq \frac{\large \pi}{2}\) is

Question

\[ (A) 2 (\sqrt{2-1}) \qquad (B) \sqrt 2 - 1 \qquad (C) \sqrt 2 + 1 \qquad (D) \sqrt 2\]