mollygrace2000 mollygrace2000

11-04-2019
Mathematics

contestada

Which expression is equivalent to cos(4x)+cos(2x)

Respuesta :

11-04-2019

Answer:

2*cos(3x)*cos(x)

Step-by-step explanation:

cos(4x) + cos(2x)

=cos(3x+x) + cos(3x-x)

Formula: cosx cosy=1/2(cos(x+y)+cos(x-y))

Here, x will be 3x according to formula and y will be equal to x

So, cos(3x+x) + cos(3x-x)

=2*cos(3x)*cos(x)

Answer Link

Otras preguntas

Graph f(x)=2x and g(x)=2^x on the same coordinate plane. What is the solution to the equation f(x)=g(x) ? Enter your answer in the box.

how do you write the mixture of the chemicals caused an eruption of smoke that filled the air as passive voice

Tyler’s brother earned $900 worth of sales. He gets 2.5% of the sales. How much was his commission he gets?

True or False The increasing demand for slave labor and the banning of slave importation by congress in 1808 led to an increase in the domestic slave trade.

A geometric sequence is defined by the recursive formula t1 = 64, tn = tn - 1 2 , where n ∈N and n > 1. The sequence is A) -64, -16, -8, -4, -2, -1, ... B)

explain why it might be important to have the speech on radio or tv

What is the most significant challenge Annabeth faces in her business model?

WILL GIVE BRAINLIEST 1) What is the value of x? Enter your answer in the box.2) What is the value of x? Enter your answer in the box.3) The area of a right tria

i need to know how many innches

What is the minimum or maximum point of a quadratic function called