Find the point on the terminal side of θ =-3 pi/4 that has an x coordinate of -1.
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http://www.algebra.com/algebra/homework/Coordinate-system/Coordinate-system.faq.question.375721.html - the same questions answer and tutorial! @mathway
no, but it's a tutorial. Plus, I was suspended for giving the answer to the question. So, this is just an example to a similar question.
I don't want you to give me the answer. @Kash_TheSmartGuy I just want to know the steps. :)
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the reference angle for -3pi/4 is pi/4.
pi/4 has the same sine and cosine. angles for which pi/4 is the reference angle will then have sines and cosines that are either equal or opposites depending on the quadrant.
make sense so far?
Does that mean that the x and y coordinates are equal?
So y will -1 as well since it is in quadrant 3, (-x,-y).
That's it? :)
Oh and it's actually a 45-45-90 reference angle, correct?