19. Use the triangles below to give the exact value (not be decimal approximations) of
each trigonometric function listed.
(a) sin(330°)
(b) cos(135°)
(c) tan(240°)
![19 Use the triangles below to give the exact value not be decimal approximations of each trigonometric function listed a sin330 b cos135 c tan240 class=](https://us-static.z-dn.net/files/d96/d9a9353cea0f2655a3ceef6c2d38b8c9.png)