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krek1111 [17]
3 years ago
5

answer these trigonometry questions please I really don't understand it and I need help with work please and thank you ​

Mathematics
1 answer:
spin [16.1K]3 years ago
4 0

Answer:

5. 28.39

6. 58.18

Step-by-step explanation:

5. To find x, use tangent since you know the opposite and adjacent legs

tangent is opposite/adjacent

tan(x)=20/37

x=tan-1(20/37)

x=28.39

6. you want to find the hypotonuse of XYZ to use tangent to find angle W

Sin(25)=15/x

0.423=15/x

0.423x=15

x=35.46

this is the hypotonuse

now use tangent to find W

tan(x)= 35.46/22

x=tan-1(35.46/22)

x=58.18

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Cot (15 degrees)
STatiana [176]

Answer:

Part I: cot(15 degrees) = cot(45 - 30)

Part II: Evaluation is below

Step-by-step explanation:

<em>Everything is done in degrees</em>

<em />

Two angles that differ by 15 degrees that is easy to evaluate is 30 degrees and 45 degrees. The cot(15 degrees) = cot(45 - 30) = 1/tan(45-30) = (1+tan45tan30)/(tan30 - tan45) = (1+ sqrt(3))/(sqrt(3) - 1)

We rationalize this by multiplying 1+ sqrt(3) in the top and bottom, getting:

(4 + 2sqrt(3))/2 = 2 + sqrt(3)

I hope this helps! :)

8 0
3 years ago
Please answer this question based on the following data. SSTR = 6,750 H0: μ1= μ2=μ3=μ4 SSE = 8,000 Ha: at least one mean is diff
Nookie1986 [14]

Answer:

P_v =P(F_{3,16}>4.5)=0.0180

So on this case the best option for the answer would be:

between .01 and .025

Step-by-step explanation:

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

If we assume that we have 4 groups and on each group from j=1,\dots,5 we have 5 individuals on each group we can define the following formulas of variation:  

SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2  

SS_{between=Treatment}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2 =6750  

SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2 =8000  

And we have this property  

SST=SS_{between}+SS_{within}=6750+8000=14750  

The degrees of freedom for the numerator on this case is given by df_{num}=k-1=4-1=3 where k =4 represent the number of groups.

The degrees of freedom for the denominator on this case is given by df_{den}=df_{between}=N-K=20-4=16.

And the total degrees of freedom would be df=N-1=20 -1 =19

We can find the MSR=\frac{6750}{3}=2250

And MSE=\frac{8000}{16}=500

And the we can find the F statistic F=\frac{MSR}{MSE}=\frac{2250}{500}=4.5

And with that we can find the p value. On this case the correct answer would be 3 for the numerator and 16 for the denominator.  

P_v =P(F_{3,16}>4.5)=0.0180

So on this case the best option for the answer would be:

between .01 and .025

6 0
4 years ago
1/4=?/24 not so sure about this
Elena-2011 [213]
Its 6. 4 x 6 = 24 so multiply 1 by 6 and thats your answer
3 0
3 years ago
Read 2 more answers
The animal shelter only has dogs and cats. If they currently have 12 cats and 27 animals, what is the ratio of cats to dogs, in
Andru [333]

Answer:

12/15

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
How do i find an ordered pair using substituion with these equations y=-4×-19 y=4×+5
eimsori [14]
Y=-4x-19 + y=4x+5 one hundred fourth place
6 0
4 years ago
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