Mathematics

$$\displaystyle\int^b_a\cos x dx$$
Obtain the definite integral as a limit of d sum.


SOLUTION
$$\displaystyle \int^b_a \cos x dx$$
$$\cos b - \cos a$$
$$\displaystyle \sum_{k=0}^{k=\infty} \cfrac{(-1)^k (b^{2k}-a^{2k})}{2k!}  $$
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Subjective Medium Published on 17th 09, 2020
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