Engineering Mathematics Calculus Definite Integrals

The value of integral \(\mathop \smallint \limits_0^{\pi /2} {x} \cdot \cos x \cdot dx\) is

1
0
2
-1
3
\(\frac{{ {\pi }}}{2}-1\)
4
\(-\frac{{ {\pi }}}{2}+1\)

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