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Brums [2.3K]
3 years ago
9

Guys i really need help. i am new to these type of math problems Please help me

Mathematics
1 answer:
tankabanditka [31]3 years ago
8 0
7.
I: when no unit, assume radians

II: hmm, 0 to pi/2 radians is 1st quadrant, pi/2 to pi is 2nd, pi to 3pi/2 is 3rd and 3pi/2 to 2pi is 4th
pi/2<1.57<pi so it is in 2st quadrant

III:
cos is negative here because cos is the x axis

IV. no because the value of cos(1.75rad) should be negative




8.
I: from 0 to 90 is 1st
from 90 to 180 is 2nd
from 180 to 270 is 3rd
from 270 to 360 is 4th

so it is in 2nd quadrant


II: sin is positive here because sin is the y axis

III: sin should be positive here so a negative value is not reasonable

IV: maybe she put 125 without putting the degrees and the calculator thought that it was radians
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From the information given

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Answer:

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Step-by-step explanation:

\text{The formula of a distance between x and y on a number line:}\\\\d=|b-a|=|a-b|\\\\\text{We have}\ a=-\dfrac{1}{4}\ \text{and}\ b=\dfrac{3}{4}.\ \text{The distance:}\\\\d=\left|-\dfrac{1}{4}-\dfrac{3}{4}\right|=\left|\dfrac{3}{4}-\left(-\dfrac{1}{4}\right)\right|

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