amandalundgreen amandalundgreen

21-12-2016
Mathematics

contestada

Verify the identity. Show your work.
cos(α - β) - cos(α + β) = 2 sin α sin β

Respuesta :

Peytiii2829 Peytiii2829

23-12-2016

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

=cos(a)cos(b) + sin(a)sin(b) - [cos(a)cos(b) - sin(a)sin(b)]
=2sin(a)sin(b)

Answer Link

Otras preguntas

solve for m -7/9 m = 11/6

Chose the justification for each step in the solution to the given equation stop application subtraction property of equality multiplication property of equalit

A given skull has flaring zygomatics, shovel-shaped incisors, round orbits, and moderate nasal aperture width. The ancestry of this individual is likely _______

Harry Byrd used his __________ _________ to steer voters to elect presidential candidates of his choice.

What equation can be written for this graph? Pls help!!!

For information to be of real value to a manager, it must be accurate information. What is meant by accuracy

Hello, can you help me? I don't speak English, I speak Spanish and I don't understand anything. I use a translator to communicate, I give brainliest !!

the ability of the heart, blood, blood vessels, and the respiratory system to supply oxygen and necessary fuel to the muscles during exercise is called

How many grams of hydrogen gas are needed to react completely with 54.0 g of oxygen gas, given the following balanced chemical reaction: 2H2 +O2 --->2H2O

Select whether the following is True or False when reporting a child safeguarding concern: Report only incidents that you witness or have evidence of. True Fal