Friday

August 29, 2014

August 29, 2014

Posted by **Carol** on Monday, April 25, 2011 at 9:06pm.

- Trigonometry -
**drwls**, Monday, April 25, 2011 at 9:39pmcos (A-B) = cosA cosB - sinA sinB

Note that cosA = 4/5 and sin B = 7/25, which you can prove using

cos^2 x + sin^2 x = 1

- Trigonometry -
**Anonymous**, Thursday, June 7, 2012 at 7:30pm117/125

**Related Questions**

MATH - 1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL ...

Trigonometry - ABC is a non-degenerate triangle such that 2\sin \angle B \cdot \...

math - find all solutions in the interval [0,2 pi) sin(x+(3.14/3) + sin(x- 3.14/...

Trigonometry - Identities - If tan 2x = - 24/7, where 90 degrees < x < 180...

trigonometry - We begin by setting t=sin 18 degrees we weill think of t an an "...

Trigonometry - use the appropriate trig identity (sum and difference, half angle...

Trigonometry - If sin A = 3/5 and cos B = 24/25 and <A and <B are both in...

Trigonometry - If cos(a)=1/2 and sin(b)=2/3, find sin(a+b), if 1) Both angles ...

maths - Angle a lies in the second quadran and angle b lies in the third ...

trig help much appreciated! :)) - 1. Find the complete exact solution of sin x...