If cosine is equal to -12/13 Find sine and tangent in Quadrant

[Ephratah7]

If cosine is equal to -12/13... Find sine and tangent in Quadrant

If cosine is equal to -12/13... Find sine and tangent in Quadrant Two... What is the answer??

 

[qspeechc]

Draw a diagram.

cosine = adjacent/hypotenuse = x/r
sine = y/r
tangent = y/x
x^2 + y^2 = r^2

Quadrant two means sine>0, and tangent<0.

That should be enough info to solve the problem.

 

[Ephratah7]

Draw a diagram.

cosine = adjacent/hypotenuse = x/r
sine = y/r
tangent = y/x
x^2 + y^2 = r^2

Quadrant two means sine>0, and tangent<0.

That should be enough info to solve the problem.

... ok, thanks. but what is ^??

 

[Ephratah7]

... ok, thanks. but what is ^??

^^... is it "raised to the power of"?

 

[HallsofIvy]

On this and many math boards, if you are just using regular letters, "^" means to the power: 2^3= 8.

Of course, here, you can also use html codes: 2[ sup ]3[ / sup ]= 8, without the spaces, gives 2³= 8. Or you can use LaTex: [ tex ]2^3= 8[ /tex ], again without the spaces, gives $$2^3= 8$$. You can see the code used for any LaTex by clicking on it. Also, there is a tutorial for LaTex in the "Homework and Coursework" section.

 

[Ephratah7]

On this and many math boards, if you are just using regular letters, "^" means to the power: 2^3= 8.

Of course, here, you can also use html codes: 2[ sup ]3[ / sup ]= 8, without the spaces, gives 2³= 8. Or you can use LaTex: [ tex ]2^3= 8[ /tex ], again without the spaces, gives $$2^3= 8$$. You can see the code used for any LaTex by clicking on it. Also, there is a tutorial for LaTex in the "Homework and Coursework" section.

...
i see.. thanks for the info.

"Euclid alone has looked on beauty bare"

^^