Thursday

October 2, 2014

October 2, 2014

Posted by **jeff** on Friday, May 28, 2010 at 9:15am.

(cos 40)(cos20) - (sin 40)(Sin 20)

Thank you

- Algebra2 -
**jeff**, Friday, May 28, 2010 at 9:22amI got it, .5

**Answer this Question**

**Related Questions**

TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...

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

Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...

algebra - Can someone please help me do this problem? That would be great! ...

trig - it says to verify the following identity, working only on one side: cotx+...

trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...

pre calc trig check my work please - sin x + cos x -------------- = ? sin x sin ...

Math - Calculus - The identity below is significant because it relates 3 ...

math - Prove that for all real values of a, b, t (theta): (a * cos t + b * sin t...

Precal - I do not understand how to do this problem ((sin^3 A + cos^3 A)/(sin A...