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

can someone help me with these?How was Islam introduced to West Africa?What was the significance of Mansa Musa's pilgrimage?

(x - 8) + 33 = 180how would i find x ?

determine whether the following equations are dimensionally correct if not how can you make them dimensionally correct 1 /2 mv2 =(mgh) 2

In a group of 120 farmers, 65 grow maize and 75 grow cassava. Of these 35 grow both maize and cassava. a. Find the number of farmers who grow only maize.

The actual data obtained from the experiment is represented on a line graph by ___. A. the broken lines between the plotted points B. the plotted point only C.

what is the wavelength of a wave traveling through a rope if the distance from one crest to the next is 1m

¿A qué se refiere el autor cuando dice que la ciudad de Nueva York tiene un espíritu vanguardista e innovador? A Es una ciudad estática y conservadora. B Es una

Is parallelogram HIJK a square?

Which of the best diagrams below represents the contrapositive of the statement "If it is an equilateral triangle, then it is an isosceles trianagle"?

Stories that a company pays to publish are called A false advertising. B opinion pieces. C editorials. D sponsored content. please answer quick