what is the sine of -390 in fraction form and how would i find out how to do this on my TI-84 graphing calculator?

Question

anonymous · Answer

Make sure the mode is set to degrees and not radians. Enter sin(-390 to find the decimal form. Then, press math and select >Frac. Press enter and you have your fraction

anonymous · Answer

Thank you so much! helped a lot!

anonymous · Answer

Tip: Don't depend on your calculator

anonymous · Answer

It /will/ screw you over.

anonymous · Answer

Yeah i have the basic points of the unit circle memorized but thats not one of them

anonymous · Answer

If you can, sketch theta. Remember that sin(k)=y/r, cos(k)=x/r, and tan(k)=y/x

anonymous · Answer

Oh okay, haven't tried that

anonymous · Answer

just to make sure I'm correct its (cos,sin) for how the ordered pairs on a nit circle are ordered right?