mollygrace2000 mollygrace2000
  • 11-04-2019
  • Mathematics
contestada

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

Respuesta :

Finti
Finti Finti
  • 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's 42 in. = ___ ft ?
Which items in this image are electrically conductiv
Are these right ? Thanks!
The monster that beowulf fought was named _____. chaucer grendel chaunticleer william the conqueror
Which of these is the most likely punishment for a person found guilty in a civil court case? question 1 options: execution incarceration fine paid to the gover
Which of the following has a value between 10/3 and 11/3 ? A- 3 1/2 B-3 1/4 C- 3 3/4 D- 3 1/8
Help please.....!!!!!
Ayn Rand, author of Anthem, would most likely agree with which statement? A. The rights of an individual are more important than the rights of a group. B. The
The maryland colony opened its settlement to _______.
Which type of behavior would an arboreal creature most likely exhibit?