Wednesday

July 30, 2014

July 30, 2014

Posted by **spencer** on Tuesday, April 13, 2010 at 8:10pm.

- trig -
**Reiny**, Tuesday, April 13, 2010 at 8:39pmcos 105°

= cos(60+45)

= cos60cos45 - sin60sin45

= (1/2)(√2/2) - (√3/2)(√2/2)

= (√2 - √6)/4

- trig -
**Reiny**, Tuesday, April 13, 2010 at 8:40pmcos 105°

= cos(60+45)

= cos60cos45 - sin60sin45

= (1/2)(√2/2) - (√3/2)(√2/2)

= (√2 - √6)/4

- trig -
**vian**, Thursday, July 19, 2012 at 10:52pmcos195

**Related Questions**

Trig - Using a double angle formula how would you find the exact value of this ...

TRIG/ALGEBRA - 1) Find the exact value. Use a sum or difference identity. tan (-...

Trig(3 all with work) - 1)Find the exact value of cos 105 by using a half-angle ...

Trigonometry - I don't understand how I'm supposed set the problem up or what ...

Trigonometric - Find the exact value of cos7(pi)/12 using sum and/or difference ...

Algebra II - 1) Find the exact value of cos 105 degrees by using a half-angle ...

trig - use sum or difference identities to find the exact value of the ...

Proving Identities - Find the exact value of cos 75 degrees.

trig - Find the exact value by using a half-angle identity. cos 22.5 degrees

Trig hep, please? Thank you! - 1. Find the exact value of sin(195(degrees)) 2. ...