matt233072 matt233072

13-11-2019
Mathematics

contestada

The value 5pi/24 is a solution for the equation 4 cos^2 (4x)-3=0. True or false

Respuesta :

13-11-2019

Let's check.

x = 5π/24

4x = 5π/6

cos 4x = cos(5π/6) = cos 150° = -√3/2

cos² 4x = (-√3/2)^2 = 3/4

4 cos² 4x -3 = 4 (3/4) - 3 = 0

Answer: TRUE

Answer Link

Otras preguntas

Answer and I will give you brainiliest

Rearrange the formula to make x the subject. y = 4x + 3

What is an equation of the line that passes through the points (0, -1) and (6, 1)?

How to solve a profit equation in college algebra. P= -x squared +52x +73. How many hotdogs must be sold to make a profit?

I have two standard, six-sided dice; one is brown, and the other is black. I roll them both. What is the probability that the sum of the numbers that I roll is

who is the prime minister of India..?

How does the experience of soldiers in WWI?

plz answer fast the question

the algebraic form of the sum of n terms of an arithmetic sequence is 3n2 + 5 n .what is the common difference ?

The diagram shows triangle ABC.A = 81°AB = 8.2 cmBC = 13.5 cmCalculate the length of AC.