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When given a graph with an unknown value of theta, and a line segment going from the origin to (-3,-4), how could you find the sin of theta?

Guest May 23, 2017
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well if you draw a line to -3,-4 and say that line is the hypotenuse 

then the line drawn from that point to -3,0 is a hight of 4

and the line drawn from 0,0 to -3,0 is a base of 3

seems like a pythrn triple 3,4,5 so hypotenuse is 5

sine is opp/hyp or 4/5, so sin theta is 4/5

Guest May 24, 2017

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