Issues with integral

[Chr Yoko]

(08-20-2020 02:42 PM)roadrunner Wrote:  In cas:

∫(1/sin2costan((sqrt(cos(x))+sqrt(sin(x)))^4),x,0,π/2) returns 1/3

-road

Thanks for the trick. Yes works on the Prime under XCAS exact mode now. But only after displaying a screen of scary warnings....

Prime Non exact XCAS mode works fine and get 0.3333 instantly with or without the sin2costan and with no warning page.

Any explanation on that interesting behavior of XCAS ?