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Mathematics 18 Online
OpenStudy (howard-wolowitz):

CAn someone show me how to do this?

OpenStudy (shelby1290):

This is how you determine the quadrent: 1.Find the value of a number using its distance and direction from zero. ... 2.Find opposite numbers on the number line. ... 3.Locate a point on the coordinate plane. ... 4.Determine the quadrant of a point. ... 5.Predict the reflection of a point by changing values.

OpenStudy (howard-wolowitz):

alright

zepdrix (zepdrix):

Hey Howard :) Sine corresponds to your y-coordinate. If your sine > 0, that means it's positive. So which two quadrants do you have a positive y-coordinate?

OpenStudy (howard-wolowitz):

one and two?

zepdrix (zepdrix):

|dw:1431480812462:dw|yup sounds good!

zepdrix (zepdrix):

tangent is like... slope. recall that tangent is sine over cosine. so you can think of it as y/x, slope of a line. tangent will be negative in these two quadrants,|dw:1431480884720:dw|see how the line slopes downward?

zepdrix (zepdrix):

So you choose the quadrant that meets both of these requirements.

OpenStudy (howard-wolowitz):

dude that would be two and four

OpenStudy (howard-wolowitz):

its weird because you can only choice one of them and not two

OpenStudy (howard-wolowitz):

@mathstudent55

OpenStudy (howard-wolowitz):

@phi can you explain to me how it could only be one answer

OpenStudy (howard-wolowitz):

its not going through one quad but two

OpenStudy (phi):

are you asking about sin(t)>0 and tan(t)<0 ?

OpenStudy (howard-wolowitz):

yes

OpenStudy (phi):

I think of sin as the "y" value and the cos as the x value first draw circle, and show where the sin(t)>0 (meaning where y is > 0) |dw:1431524176716:dw|

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