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Schach [20]
4 years ago
13

Find the value of arc cos 0

Mathematics
1 answer:
nalin [4]4 years ago
5 0
Let arc cos 0 = y
so
cos y = 0
if you need only one value,
then y = pi/2 or 90 degrees.
You might be interested in
Need some math help please!
stellarik [79]

Hello!

In our triangle, c is the hypotenuse. We are given an adjacent side length to our angle. This means we will use the cosine. Let's find it first.

cos54≈0.59

This gives us the equation below.

0.59=9/c

0.59c=9

c≈15.25

Therefore, c is equal to about 15.25

I hope this helps!

8 0
3 years ago
Read 2 more answers
Rachel recorded the number of calls she made at work during the week:
Dmitry [639]

The chi-squared test statistic will be 3.11. The test statistic is contrasted with a predicted value based on the Chi-square distribution.

<h3>What is the chi-squared test statistic?</h3>

Finding the squared difference between the actual and anticipated data values, then dividing that difference by the expected data values, constitutes the test statistic.

The formula for the chi-squared test statistic is;

\sum \frac{(O_i-E_i)^2}{E_i } \\\\

Where,

\rm O_i is the observed value

\rm E_i is the expected value

The chi-square test statics is;

\rm( \frac{18-18}{18} )^2 +( \frac{14-18}{18} )^2 + (\frac{24-18}{18} )^2+( \frac{16-18}{18} )^2 \\\\ 0+ \frac{16}{18}+ \frac{36}{18} +\frac{4}{18}\\\\ \frac{56}{18} \\\\ 3.11

Hence, the chi-squared test statistic will be 3.11.

To learn more about the chi-squared test statistic refer;

brainly.com/question/14082240

#SPJ1

5 0
3 years ago
Easy one - giving brainly - show work.<br>you can do any of the 3, i don't mind.​
Murrr4er [49]

Answer:

A

Total before tax: $118

Total after tax: $102.66

Step-by-step explanation:

For A, we add the cost of the shirt and jeans to get the total before tax.

$39.20 + $79.80 = $118.00

For the total, after 13% we see how much 1% is.

1% of $118 is $1.18

$1.18 * 13 = $15.34.

$118 - $15.34 = $102.66

Hope this helped! Have a nice day :)

6 0
3 years ago
There are 15 pieces of fruit in a bowl and six of them are apples. What percentage of the pieces of fruit in the Bowl are apples
aleksklad [387]

Answer:

40%

Step-by-step explanation:

amount of apples = 6

total amount of fruits = 15

percentage of apples

= 6/15 x 100%

= 40%

3 0
3 years ago
Find peremiter of pqr
harkovskaia [24]

Answer:

79.2 units

Step-by-step explanation:

Tangents to a circle from an external point are congruent , then

PQ = 27.4

QR = 5.9 + 12.2 = 18.1

PR = 12.2 + (27.4 - 5.9 ) = 12.2 + 21.5 = 33.7

Then

perimeter = PQ + QR + PR = 27.4 + 18.1 + 33.7 = 79.2

7 0
3 years ago
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