Question

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?

Answer 1

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

Answer 2

Thank you so much! helped a lot!

Answer 3

Tip: Don't depend on your calculator

Answer 4

It /will/ screw you over.

Answer 5

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

Answer 6

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

Answer 7

Oh okay, haven't tried that

Answer 8

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