1.

The value of \(\mathop \smallint \nolimits_{\rm{a}}^{\rm{b}} \frac{{{{\rm{x}}^7} + \sin {\rm{x}}}}{{\cos {\rm{x}}}}{\rm{dx}}\) where a + b = 0 is

A. 2b – a sin (b - a)
B. a + 3b cos (b - a)
C. sin a – (b - a) cos b
D. 0
Answer» E.


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