oyedejioyewolemaxwel oyedejioyewolemaxwel

11-07-2022
Mathematics

contestada

Prove that
cos^4∆ - sin^4∆ = 2cos^2∆ - 1

Respuesta :

Medunno13 Medunno13

11-07-2022

[tex]\cos^{4} x-\sin^{4} x\\\\=(\cos^{2} x+\sin^{2} x)(\cos^{2} x-\sin^{2} x)\\\\=\cos^{2} x-\sin^{2} x\\\\=\cos^{2} x-(1-\cos^{2} x)\\\\=2\cos^{2} x-1[/tex]

Answer Link

Otras preguntas

If the simple interest on $2000 for 2 years is $320, then what is the interest rate?

A matinee movie ticket costs $6.50 per child. Which equation can be used to calculate the matinee ticket price, M, for n children? M = 6.50n n = 6.50M M equ

what is constant of proportionality

Find the diameter of a cone that has a volume of 83.74 cubic inches and a height of 5 inches. Use 3.14 for pi. a. 3 inches b. 4 inches c. 8 inches d. 16 inches

Organize the following things from the smallest to the biggest: Chromosome Cell DNA Gene

Freckles in humans are inherited by which pattern: dominant/recessive, incomplete dominance, or codominance

Which is true in a balanced budget? Choose exactly two answers that are correct. A. No single variable expense is greater than any of the fixed expenses.

Speakers who explain their expertise on the speech topic are likely to reduce their credibilty with the audience

When Thomas Jefferson added the Louisiana Territory to the United States, it __________the existing U.S. territory. A) doubled B) quadrupled C) tripled D) exten

How is coal formed? from hydrothermal deposits from igneous intrusions from 300 to 400 million year old plant remains from oil deposits that have solidified