Posted by **Jennifer** on Thursday, March 3, 2011 at 7:55pm.

use the appropriate trig identity (sum and difference, half angle, double angle) to find the exact value. 1)cos 255 degrees

2) sin 165 degrees

3) tan 285 degrees

## Answer this Question

## Related Questions

- TRIG/ALGEBRA - 1) Find the exact value. Use a sum or difference identity. tan (-...
- MATH - 1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL ...
- trigonometry - We begin by setting t=sin 18 degrees we weill think of t an an "...
- Trigonometry - Identities - If tan 2x = - 24/7, where 90 degrees < x < 180...
- Algebra II - Multiple Choice (theta) means the symbol 0 with the dash in it. 1.)...
- Math-Trigonometry - Use the half-angle formulas to find the exact values. Cosine...
- Trigonometry - Please review and tell me if i did something wrong. Find the ...
- Trig hep, please? Thank you! - 1. Find the exact value of sin(195(degrees)) 2. ...
- Algebra 2 Honors - Find the exact value by using an appropriate sum or ...
- trig - use a half-angle identity to find the exact value of tan 105 degrees.

More Related Questions