Posted by **Kate** on Sunday, July 17, 2011 at 8:49am.

Determine the EXACT values of each of the following:

a) sin 240°

b) cos 135°

- Math -
**Reiny**, Sunday, July 17, 2011 at 9:07am
sin 240

1. where is the angle ? in quadrant III , so it is -

2. How far away from the x-axis ? 60° (the angle in standard position)

= - sin 60°

= = √3/2 , (from the 30-60-90 triangle)

see if you can the second one in the same way.

- Math -
**Reiny**, Sunday, July 17, 2011 at 9:08am
small typo, answer should have said ....

= - √3/2

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