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Leno4ka [110]
4 years ago
7

Please help me with this

Mathematics
1 answer:
Alex777 [14]4 years ago
4 0

Answer:

\frac{\sqrt{51} }{10}

Step-by-step explanation:

Using the Pythagorean identity

sin²x + cos²x = 1 ⇒ cosx = ± \sqrt{1-sin^2x}, hence

cosΘ = \sqrt{1-(7/10)^2}

        = \sqrt{1-\frac{49}{100} }

        = \sqrt{\frac{51}{100} }

        = \frac{\sqrt{51} }{\sqrt{100} } = \frac{\sqrt{51} }{10}

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Perimeter of this shape
motikmotik

Answer:

22 cm

Step-by-step explanation:

Simply count the number of square units of each side, then add them up. (each square unit = 1 cm)

4+4+2+3+2+7

= 22 cm

6 0
3 years ago
Read 2 more answers
How do you know if a graph you are looking at shows a periodic function? How do you determine the period of the graph?
mylen [45]

Answer:

A function f(x) is said to be periodic, if there exists a positive real number T such that f(x+T) = f(x).

You can also just say: A periodic function is one that repeats itself in regular intervals.

Step-by-step explanation:

The smallest value of T is called the period of the function.

Note: If the value of T is independent of x then f(x) is periodic, and if T is dependent, then f(x) is non-periodic.

For example, here's the graph of sin x.  [REFER TO PICTURE BELOW]

Sin x is a periodic function with period  2π  because  sin(x+2π)=sinx  

Other examples of periodic functions are all trigonometric ratios, fractional x (Denoted by {x} which has period 1) and others.

In order to determine the period of the determined graph however, just know that the period of the sine curve is the length of one cycle of the curve. The natural period of the sine curve is 2π. So, a coefficient of b=1 is equivalent to a period of 2π. To get the period of the sine curve for any coefficient b, just divide 2π by the coefficient b to get the new period of the curve.

Hopefully this helped a bit.

6 0
3 years ago
If the functions are linear, write than in f(x)= ax+b form.
Norma-Jean [14]
The answer is 2x-8 and 1/7+7
5 0
3 years ago
A survey asked 20 mobile phone dealers how many mobile phones were sold during the previous week. Their answers are displayed in
Sidana [21]

The best type of chart for quickly deriving the mode of a sample data is called the Stem-and-Leaf Plot.

<h3>What is a Stem-and-Leap Plot?</h3>

In statistics, the Stem-and-Leaf Plot is an easy-to-make easy-to-read kind of graph that is derived from the table holding the sample data.

The Box-and-Whisker Plot on the other hand is best for visually depicting the five-number summary of any set of data, which are:

  • Minimum
  • First Quartile
  • Median (Second Quartile)
  • Third Quartile; and
  • Maximum.

It is to be noted that referenced plots are not indicated hence, the general answer.

Learn more about Stem-and-Leaf Plot at:
brainly.com/question/8649311
#SPJ1

8 0
2 years ago
At the aquarium, there are 200 fish for every 1 shark. What is the ratio of sharks to fish?​
damaskus [11]

Answer:

1 to 200  or 1:200 or 1/200

Step-by-step explanation:

If there is 1 shark for every 200 fish then the ratio would be sharks (1) over fish (200)

3 0
3 years ago
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