What is the sine, cosine, and tangent of 10pi/3?

First ,   realize 10/3 pi   is the same as 4/3 pi

4/3 pi is in the 3rd quadrant so the sine AND cosine will be negative....the tangent and cotangent will be positive

4/3 pi radians  is equivalent to 240 degrees

sine is  -sqrt(3)/2   or  -.866     Cosine is - 1/2     tangent is sin/cos.... I think you can do that math.

Good luck with your studies!