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JulijaS [17]
4 years ago
11

If Sin A = 0.5736, what is the Cos A =

Mathematics
1 answer:
Y_Kistochka [10]4 years ago
7 0

<em>The value of CosA is 0.8191</em>

Step-by-step explanation:

Given SinA= 0.5736

We know that SinA^{2} + CosA^{2} = 1

Replacing value of SinA,

(0.5736)^{2} + CosA^{2} = 1

(0.3290) + CosA^{2} = 1

CosA^{2} = 1-0.3290

CosA^{2} = 0.6709

CosA = 0.8191

The value of CosA is 0.8191

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Write the sentence as an equation.<br> 378 Is the same as w times 241, decreased by 223
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Answer:

it should be 378 = w(241 - 223)

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3 years ago
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Answer:

answer  choice D

Step-by-step explanation:

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5 0
3 years ago
A random sample of 101 lightning flashes in a certain region resulted in a sample average radar echo duration of 0.81 sec and a
Masteriza [31]

Answer:

The 99% (two-sided) confidence interval for the true average echo duration μ is between 0 sec and 1.99 sec.

Step-by-step explanation:

We have the sample standard deviation, so we use the student t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 101 - 1 = 100

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 100 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 2.6259

The margin of error is:

M = T*s = 2.6259*0.45 = 1.18

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 0.81 - 1.18. Answer in seconds cannot be negative, so we use 0 sec.

The upper end of the interval is the sample mean added to M. So it is 0.81 + 1.18 = 1.99 sec

The 99% (two-sided) confidence interval for the true average echo duration μ is between 0 sec and 1.99 sec.

6 0
3 years ago
Which of these is a zero of the polynomials p(y) = 3y^3 - 16 y - 8? * - 8 0 2 - 2
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The zero of polynomials is -2. The polynomials is p(y) = 3y^{3} - 16 y - 8.

According to the question,

The polynomials is p(y) = 3y^{3} - 16 y - 8. In order to find the zero of polynomials only if we substitute the value and polynomials become zero.

p(-2) = 3(-2)^{3} - 16 (-2) - 8

= 3(8) + 32 -8

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Hence, the zero of polynomials is -2. The polynomials is p(y) = 3y^{3} - 16 y - 8.

Learn more about polynomials here

brainly.com/question/1720316

#SPJ4

8 0
2 years ago
The perimeter of a rectangular field is 372 yards. If the width of the field is 87 yards, what is its length?__yards
worty [1.4K]

ANSWER

The length of the rectangular field is 99 yards

EXPLANATION

Given information

The perimeter of a rectangle field is 372 yards

The width of the field is 87 yards

To find the length of the rectangular field, follow the steps below

Step 1: Write the formula for finding the perimeter of a rectangular field

\begin{gathered} \text{ The perimeter of a rectangular field = 2\lparen l + w\rparen} \\ \text{ where l =length, and w = width} \end{gathered}

Step 2: Substitute the given data into the formula in step 1

\begin{gathered} \text{ Perimeter = 2 \lparen l + w\rparen} \\ \text{ Perimeter = 372 yards} \\ \text{ width = 87 yards} \\ \text{  372 = 2\lparen l + 87\rparen} \\ \text{ Divide both sides by 2} \\ \text{ }\frac{372}{2}\text{ = }\frac{2}{2}(l\text{ + 87\rparen} \\ 186\text{ = l + 87} \\ \text{  subtract 87 from each sides of the equation} \\ \text{ 186 - 87 = l + 87 - 87} \\ \text{  99 = l} \\ l\text{ = 99 yards} \end{gathered}

Hence, the length of the rectangular field is 99 yards

7 0
1 year ago
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