Friday

November 28, 2014

November 28, 2014

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

a) sin 240°

b) cos 135°

- Math -
**Reiny**, Sunday, July 17, 2011 at 9:07amsin 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 9:08amsmall typo, answer should have said ....

= - √3/2

**Answer this Question**

**Related Questions**

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 - 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 ...

math - use exact values of the sin,cos and tan of (pi/3) and (pi/6)(which I have...

tigonometry - expres the following as sums and differences of sines or cosines ...

math - Determine exact value of cos(cos^-1(19 pi)). is this the cos (a+b)= cos a...