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

Cumulative risks can result from

The macula densa cells respond to ________.

Directions: For each question, present the answer in complete sentences with supporting information from the Lesson. Do not copy and paste from the Lessons or I

you are a concerned citizen about high levels of corruption in you area.write an article (letter to the editor) Zambia Daily mail to senitize the public.

Match each polynomial to the term that does not change the polynomial's classification when added to it. x2 + 3x -3y x3 – 5x2 + 1 xy xy – 1 -2x3 x + y -x arrowB

Select the correct answer from the drop-down menu. Read the excerpt from paragraphs 10 and 11. Our joint action on this issue—as much as any other—will test the

In the procedural text "How to Make a Paper Airplane,” how does the reader know what to do next? Check all that apply. The steps are numbered. The text uses sig

Which equation would you use to solve the following situation? There are 3 people at a party. Several more people arrive late, and now there are 14 people at th

Una persona camina 4 m al norte y 3 m,a 30° hacia el noroeste.¿cual es su desplazamiento resultante?

Which choice best expresses the essential message of the first three sentences of the passage?