1.

\({{\rm{I}}_{\rm{m}}} = \mathop \smallint \nolimits_0^{\rm{\pi }} \frac{{\sin 2{\rm{mx}}}}{{\sin {\rm{x}}}}{\rm{dx}},\)What is I2 + I3 equal to?

A. 4
B. 2
C. 1
D. 0
Answer» E.


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