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Mathematics 9 Online
OpenStudy (anonymous):

If cosθ=3/5, then tanθ= ?

OpenStudy (imstuck):

Cosine is positive in the first and the fourth quadrants. It would look like either one of these graphs|dw:1403022807762:dw|

OpenStudy (imstuck):

You need to figure out the other leg of this triangle. Do you know how to do that?

OpenStudy (anonymous):

No I don't know how to figure out the other leg of the triangle

OpenStudy (imstuck):

Use Pythagorean's Theorem. Do you know it?

OpenStudy (imstuck):

Ok, either you're not replying or my internet is very slow. But I don't have time to wait cuz I gotta go out. I also don't want to leave you hanging here so here's the deal with this.

OpenStudy (imstuck):

|dw:1403024255602:dw|Now that you have the 2 legs and the hypotenuse look at them in terms of tangent|dw:1403024414011:dw|It all depends upon which quadrant your angle is located in.

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