What is 38 divied by 7 in long division
1 answer:
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Step-by-step explanation:
in trig there are three functions: sin, cosine, and tan
when using trig, you are supposed to pick one angle to make the equation according to
sin= opposite ÷ hypotenuse
cosine= adjacent ÷ hypotenuse
tan= opposite ÷ adjacent
For example 13:
make the equation according to angle 41
you have the adjacent side and opposite side, so use the tan function
tan(41) =
move x so that it becomes a numerator by multiplying both sides by x:
(x) tan(41) = 4
divide both sides by sin(41): x = 4 ÷ tan(41)
plug this into your calculator to get 4.6
Answer:
Mean=50.
standard deviation=50.
Step-by-step explanation:
Let the perfect score be 100.
The mean(average) of a data is given by:
Here the number of data points are 100. out of which 50 attains a value 100,and 50 attains value 0.
so, sum of data points=50×100+50×0=5000.
Mean=50.
"Now the standard deviation of data points are calculated by firstly subtracting mean from every entry and then square the number and take it as new entry and calculate the mean of the new data entry and lastly taking the square root of this new mean".
Here if 50 is subtracted from each entry the new entry will have 50 entries as '50' and 50 entries as '-50'.
next on squaring we will have all the 100 entries as '2500'.
now the mean of these entries is:
=2500
taking it's squareroot we have
Hence, standard deviation=50.