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

## Answer This Question

## Related Questions

- Trig (math) - 1.) Write the complex number in trigonometric form r(cos theta + i...
- MATH - 1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL ...
- trigonometry (please double check this) - Solve the following trig equations. ...
- math - Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the ...
- math - Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the ...
- Math- Trig - 1. Determine the exact value of cos^-1 (pi/2). Give number and ...
- math - use exact values of the sin,cos and tan of (pi/3) and (pi/6)(which I ...
- math - 3. Find the exact value of the following, show all work. a. sin^2 (75^0)/...
- math - use exact values of the sin,cos and tan of (pi/3) and (pi/6)(which I have...
- math - Determine the exact value of the following. a) sin300 degress b) tan (-...

More Related Questions