Sunday

December 21, 2014

December 21, 2014

Posted by **ashely** on Saturday, February 11, 2012 at 2:07pm.

cos(a-b)=cos(a)cos(b)+sin(a)sin(b)

**Answer this Question**

**Related Questions**

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

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

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

pre-cal - Simplify the given expression........? (2sin2x)(cos6x) sin 2x and cos ...

Vector - Let 𝑎⃗ and 𝑏 be two vectors in the xy plane ...

Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...