I'm trying to use my TI-89 Titanium calculator to integrate the function sin(2x)/(1+sin x) with respect to x and when I type it in and press enter it gives me the same exact expression I just typed in. I'm pretty sure I'm typing the format in right because i've successfully integrated many other integrals. Does it have something to do with the fact that the function can only be integrated using trig identites? Does anybody know what's going on?