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
Alex73 [517]
2 years ago
5

Marco wrote the equation below.

Mathematics
1 answer:
vova2212 [387]2 years ago
6 0

Answer:

It is true, because the cosine function has a period of 2π


Step-by-step explanation:

Since, the period of the cos function is 360° ( or 2π radians ), it holds the property of:

Cos(\theta)=Cos(2\pi +\theta)


Taking \theta as -\frac{\pi}{2}, (2\pi + \theta) is equal to  2\pi + (-\frac{\pi}{2})\\=2\pi - \frac{\pi}{2}\\=\frac{4\pi-\pi}{2}\\=\frac{3\pi}{2}

The equation is true!

<u>Note:</u> The cos function is even function


Hence, the equation is true, because the cosine function has a period of 2π, NOT because the cosine function is ODD, which it is not!!

You might be interested in
What two consecutive integers does 20−−√ fall between?
Alex_Xolod [135]

Answer:

4 and 5

Step-by-step explanation:

8 0
2 years ago
An engineer is planning a new water pipe installation. The circular pipe has a diameter of d=20\text{ cm}d=20 cmd, equals, 20, s
aivan3 [116]

Answer: The answer is 314.28 cm² (approx.).


Step-by-step explanation:  Given that an engineer is going to install a new water pipe. The diameter of this circular pipe is, d = 20 cm.

We need to find the area 'A' of the circular cross-section of the pipe.

Given, diameter of the circular section is

\textup{d}=20~\textup{cm}.

So, the radius of the circular cross-section will be

\textup{r}=\dfrac{\textup{d}}{2}=\dfrac{20}{2}=10~\textup{cm}.

Therefore, cross-sectional area of the pipe is

\textup{A}=\pi \textup{r}^2=\dfrac{22}{7}(10)^2=\dfrac{2200}{7}=314\dfrac{2}{7}=314.28~.~.~.~\textup{cm}^2.

Thus, the answer is 314.28 cm² (approx.).

4 0
3 years ago
What is m3 + 9n when m = 4 and n = 5
WINSTONCH [101]
I believe the answer is 57
6 0
2 years ago
Read 2 more answers
Determine whether the system has no one, or infinitely many solutions.
11Alexandr11 [23.1K]
This has no solution
6 0
3 years ago
What is the quotient of 1,854/18?
kramer

Answer:

103

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Simplify this expression.<br> 3^5/3^3
    5·2 answers
  • You are baking cookies for your class. There are 23 total students in your class and you have baked 12 cookies. Write and solve
    13·1 answer
  • 15.6<br> 10cm<br> 12cm<br> 11cm<br> find the suface of each triangular prism
    6·1 answer
  • Craig scored 12 points in a game.Marla scored twice as many points as Craig but 5 fewer points than Nelson scored.How many point
    7·2 answers
  • The radius of one sphere measures twice the length of another. The ratio of their surface areas is
    8·2 answers
  • If 22/15 = 23/x what is x equal to
    8·1 answer
  • For this you are subtrating polynomial expressions
    10·1 answer
  • What can graphs be used for?
    14·1 answer
  • Mrs.Tampo has 17 students in her class last year and this year she had 25 students in math class what is the percent of change
    9·2 answers
  • Simplify and solve step by step 4x -2x -20x + x
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!