23:
2 answers:
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With rounding:
is less than 
so we round it down to whole number:
is more than so we round it up to whole number:
Now we have to add rounded numbers
Without rounding:
to make it more visible I will write it differently:
is equal to
we can see that
is equal to 
so:
<span>As you see in this example those equations are equal so it doesn't matter if you take rounded numbers or not, it may be different in case like
( 
is just an example it could be any other number between 
) because in this case it will be equal 
and another example 
(in this case 
is just an example, it can be any other number between 
:) ) and here, answer for this equation is 
.</span>
Now we have to add rounded numbers
Without rounding:
we can see that
so:
<span>As you see in this example those equations are equal so it doesn't matter if you take rounded numbers or not, it may be different in case like
The angle is 75.52 degrees
If there is a vector with the form a i + b j, the cosine of the angle between the given vector and the positive direction of the x - axis is calculated as:
cos θ =
So, given the vector i+, the cosine of the angle between the vector and the x-axis is:
cos θ = 0.25
Therefore, the angle θ between the given vector and the positive direction of the x-axis is:
θ = cos-1(0.25) = 75.52
For more information about angles, visit
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