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4 years ago

If the sin 30° is 1 over 2, then the cos ° = _.

Mathematics

2 answers:

Ahat [919]4 years ago

8 0

Answer:

Below.

Step-by-step explanation:

(sine) $sin=30=1/2$

$=cos [90-30]$

Which means cos=60

Same as:

(cosine) $cos=60=1/2$ or $Sin30=Cos 60=1/2$

Hence, the answer is...

cos 60° = ½....

By:✨ RobloxYt ✨

kotykmax [81]4 years ago

6 0

Step-by-step explanation:

The sine of an angle is the same as the cosine of its complement.

If sin 30° = ½, then cos 60° = ½.

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The table shows data from a survey about the number of times families eat at restaurants during a week. The families are either

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Solution:

1. Rome

Minimum=0

Maximum=16

$Q_{1}=3, Q_{3}=13, {\text{IQR}=Q_{3}-Q_{1}=13-3=10,$

Median , $Q_{2}=8.5$

Mean = 8

Standard Deviation(σ)=5.4

As, difference between , Maximum -Mean =Mean - Minimum=8

So, Mean will Worthy description to find the center of Data set, given about Rome.

2. New York

Minimum=1

Maximum=20

$Q_{1}=4.5, Q_{3}=6, {\text{IQR}=Q_{3}-Q_{1}=6-4.5=1.5,$

Median , $Q_{2}=5.5$

Mean = 7.25

Standard Deviation(σ)=6.1

As, for New york , Mean is not the mid value, that is difference between Mean and Minimum is not same as Maximum and Mean.

As, you can see , the three Quartiles , $Q_{1},Q_{2},Q_{3}$ are very close to each other, it means , other data values are quite apart from each other. So, Mean will not appropriately describe the given data.So, in this case Median will suitable to find the center.