Question Number 98245 by M±th+et+s last updated on 12/Jun/20
$$\underset{{k}\rightarrow\mathrm{0}} {{lim}}\int_{\mathrm{0}} ^{{k}} \frac{\mathrm{1}}{\:\sqrt{{cos}\left({x}\right)−{cos}\left({k}\right)}}{dx}=? \\ $$
lim-k-0-0-k-1-cos-x-cos-k-dx-