What is the value of the definite integral \(\mathop \smallint \limits_0^\pi sinx\ dx\), taking 4 sub-intervals of equal width, using Trapezoidal rule?
1
\(\frac{\pi }{4}\left[ {\sqrt 2 - 1} \right]\)
2
\(\frac{\pi }{4}\left[ {2 + \sqrt 2 } \right]\)
3
\(\frac{\pi }{4}\left[ {2 - \sqrt 2 } \right]\)
4
\(\frac{\pi}{4}\left[ {1 + \sqrt 2 } \right]\)