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I was studying calculus and I had a problem while checking my results.

I came to the following result:

[tex]\int_{\frac{\pi}{6}}^{\frac{\pi}{2}}\frac{1}{\sqrt{\sin t}}\:\mathrm{d}t = \sqrt{2}\cdot \mathrm{F}\left(\frac{\pi}{4},\frac{1}{4}\right) \approx1.16817[/tex]

However, Mathematica shows:

[tex]\int_{\frac{\pi}{6}}^{\frac{\pi}{2}}\frac{1}{\sqrt{\sin t}}\:\mathrm{d}t = 2\cdot \mathrm{F}\left(\frac{\pi}{6},2\right) \approx1.16817-9.26622\cdot10^{-17}\mathrm{i}[/tex]

The results are almost identical (numerically) and I believe I didn't make any mistakes... is there a problem with Mathematica here?

Thanks for your help.

PS: Sorry for not using the template but it didn't make much sense here...