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

The picture shows a jar of grape jelly. If you were to shine a bright light through the jar, what would happen to most of the light?

which of these most directly impacts a person's physical health? a. where you live b. personal relationships c. amount of sleep d. number of friends

If a person under the age of 16 is found guilty of driving under the influence of drugs, his or her driving privileges will be ____________________ for the firs

how did the enlightenment in europe influence revolutionary leaders

__________are indexes of information, based on keywords embedded in documents, that allow search engines to find what internet users are looking for.

Please answer Plz answer 1-4

Paula's mother painted paula's nails with an unpleasant-tasting salve to stop her nail biting. this illustrates ________.

What types of behaviors do kids engage in that promotes obesity?

Which of these statements is true about the "Iran-Contra" affair? A) Impeachment proceedings on President Reagan began in 1986. B) Money from the exchange was

A recipe calls for 2/3 cup of milk. If you make 3 1/2 times the recipe, how much milk do you need?