1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
BartSMP [9]
1 year ago
8

Use the unit circle to evaluate the followingHow do I solve this problem?

Mathematics
1 answer:
Ilya [14]1 year ago
6 0

Notice that:

\cos (\frac{4\pi}{3})=\cos (\pi+\frac{\pi}{3})\text{.}

Recall that:

\cos (\pi+x)=-\cos (x)\text{.}

Therefore:

\cos (\frac{4\pi}{3})=-\cos (\frac{\pi}{3})=-\frac{1}{2}\text{.}

Answer:

cos(\frac{4\pi}{3})=-\frac{1}{2}\text{.}

You might be interested in
Find x. Give your answer in the
garri49 [273]

Answer:

x = 4

Step-by-step explanation:

sin 30 = x/8

0.5 = x/8

x = 4

7 0
3 years ago
Solve the inequality. Graph the solution. Describe the graph in the area provided. Be sure to indicate where there is an open or
natka813 [3]

Step-by-step explanation:

The given inequality is :

-27\ge \dfrac{1}{2}(6x-12)

Solving RHS of the inequality:

-27\ge \dfrac{1}{2}\times 2(3x-6)\\\\-27\ge (3x-6)

Adding 6 both sides of the inequality

-27+6\ge (3x-6)+6\\\\-21\ge 3x\\\\x\le -7

The attached figure shows the graph for the given inequality.

7 0
3 years ago
(3x^2)^-3y divided by xy
scZoUnD [109]
The number in the photo should be the answer but the problem might just be that your question was worded incorrectly.

8 0
3 years ago
Please help <3
Aleksandr [31]

Answer:

x =3

Step-by-step explanation:

3(4x + 4) = 2(5x+9) - 12

First step is to open the brackets by multiplying. It becomes

3×4x + 3×4 = 2×5x + 2×9 -12

12x + 12 = 10x + 18 - 12

Collecting like terms on the right hand side and left hand side of the equation, it becomes

12x -10x = 18 -12 -12

2x = -6

Negative sign on the right hand side of the equation overwhelms the positive sign on left hand side of the equation. It becomes

2x = -6

x = -6/2 = -3

Checking

3(4×-3 + 4) = 2(5×-3+9) - 12

-24 = -12-12= -24

So x = -3

3 0
3 years ago
20 divided by 2 (5 5)=
Anni [7]
20 ÷ 2 (5,5)
20 ÷ 2 (25)
20 ÷ 50
.4
8 0
3 years ago
Other questions:
  • The difference of a number divided by 7 and 9 is equal to 2. use the variable C fot the unknown
    5·2 answers
  • Suppose there is a strong positive correlation between v and w. Which of the following must be true?
    12·1 answer
  • 22n=418<br><br><br> what is the vaule of n.
    7·1 answer
  • Enter the division problem 15 ÷11 as a fraction.
    14·2 answers
  • A spinner is divided into 5 equal sections numbered 1 to 5. The theoretical probability of the spinner stopping on 3 is 20%. Whi
    9·1 answer
  • Which inequality is represented by this graph?
    15·2 answers
  • Thanks if u help and brainly
    5·2 answers
  • What is the value of a+1/a? when 5+5/a=10
    13·1 answer
  • 6. Calculate the area of the octagon in the<br> figure below.
    14·1 answer
  • The following data points represent the number of jars of honey Martha the Bear consumed each day this week.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!