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

What is the maximum value of 6x + 10y in the feasible region?

Which expressions are equivalent to the one below? Check all that apply. 7^3*7^x a.7^3+x b.7^3-x c.(7*x)^3 d.49^3 e.7^3x f.343*7^x

This large peninsuiar country is mostly desert in asia?

Fill in the blank. The man to _____ you have just spoken is my father.

What is the median of the data in this stem-and-leaf plot? 40 43 44 46

Which of these is the solution to the system of equations? Y=12x-18 Y=13x-18 Is it a. (-18,0) B. (0,-18) C. (1,-6) D. (1,-5)

What happens at the climax of the story “The Monkey’s Paw”?

The prism below is made of cubes which measure of a centimeter on one side. What is the volume?

Why did industry thrive in New England instead of agriculture?

In order to protect herself from experiencing anxiety, nancy is attributing her own unacceptable aggressive impulses to another individual. nancy is using a(n: