amandalundgreen
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 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

Which of these lines from "the story of an hour" describes Mrs. Mallards initial reaction upon learning of her husbands death
Before 2017 what things could you buy in stores in Puerto Rico on sundays
Why are DNA and rna important for cells
what an example of medical necessity
Criticism is only good when you know about the problem beforehand.
In "The Convict and the Bishop," how does the bishop show respect for Jean Valjean? A. He removes the silver from the table. B. He gives Valjean a lot of
Sun warms the earth by _____ A.Radiation B.Convection C.Conduction D.Electromagnetism
anne runs 6 laps on a track. she runs a tital of 1mile, or 5,280 feet. Write and solve an equation to find the distancr, in feet, that sheruns in each lap.
Pls help me! I'm confused
The value of a professional basketball player's autograph rose 10% in the last year. It is now worth $264.00. What was it worth a year ago?