Posted by **Jillian** on Friday, December 9, 2011 at 2:10pm.

Calculate the exact values of sin(theta) cos(theta) and tan (theta) when theta=240 degrees.

How would I do this with and without a calculator?

- Calc -
**Steve**, Friday, December 9, 2011 at 3:09pm
Learn your standard angles in their various orientation around the circle.

0 pi/6 pi/4 pi/3 and pi/2 are important enough to memorize

In degrees, that's 0 30 45 60 90

240 = 180 + 60

so it's in the 3rd quadrant.

Use the functions of 60 degrees, except that sin and cos are both negative there.

## Answer this Question

## Related Questions

- Calculus - I wanted to confirm that I solved these problems correctly (we had to...
- easy trig - If sin(theta)=[sqrt(70)]/7 and theta is in Quadrant two, find the ...
- simple trig - If sin(theta)=[sqrt(70)]/7 and theta is in Quadrant two, find the ...
- Algebra II - Multiple Choice (theta) means the symbol 0 with the dash in it. 1.)...
- Mathematics - 1. Show that Sin3 Theta - Cos2 Theta = (1 - Sin Theta)(4Sin^2 ...
- Math - 1. Let (-7, 4) be a point on the terminal side of (theta). Find the exact...
- Algebra II - Multiple Choice Which expression is NOT equivalent to 1? (theta) ...
- Precalculus check answers help! - 1.) Find an expression equivalent to sec theta...
- Precalculus check answers help! - 1.) Find an expression equivalent to sec theta...
- math - I have a question I have been working on since yesterday and I am not ...