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

What is a Mandala Autobiography?

a person who studies word origins and meanings would most likely be a

. What are three factors that could contribute to a source not being credible?

. What are three factors that could contribute to a source not being credible?

2(n-3)=4n+1 this sucks not knowing the answer

among the qualities listed on the human relations scale, the most important one for the building new relationship is?

factoring 12m^2n^2-8mn+1=

A transformer has a primary coil with 600 turns and a secondary coil with 300 turns. If the output voltage is 320 volts, what is the input voltage?A. 8 volts

What is a Mandala Autobiography?

Any number that is divisible by 3 is also divisible by 9.Find a counterexample to show that the conjecture is false.18274548