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|dw:1350326762097:dw|

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we know the length of that side is one because we were told that y = 1

any idea how we can find it?

tan 3pi/4=1/x?

nope, you used the wrong angle, we need to find the angle inside that triangle

|dw:1350328078591:dw|

the 3pi / 4 is outside the triangle

If I use the Unit Circle and says that 3pi/4 is 135... and I am looking for that inside angle I get that it is equal to 45.

right, so now we can use tangent to find x
\[\tan(45) = \frac{ 1 }{ x }\]

isolate x and you've got it

x=-1?

yep!

got it... thanks!

how is x= -1?

So the point would be (-1, 1)?

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