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Math Help - trig problem

  1. #1
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    trig problem

    Hey guys I have a problem and I can't figure it out. I have to points on a plane. One point is (0,0), the other point is (x,y). When I join these points the length of the line is 90. This line is used to make a right angle triangle with both angles (non right angles) pi/4. How do I figure out the points (x,y) using SIMPLE trig? Any help is greatly appreciated. Cheers.
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  2. #2
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    Quote Originally Posted by trigprob View Post
    Hey guys I have a problem and I can't figure it out. I have to points on a plane. One point is (0,0), the other point is (x,y). When I join these points the length of the line is 90. This line is used to make a right angle triangle with both angles (non right angles) pi/4. How do I figure out the points (x,y) using SIMPLE trig? Any help is greatly appreciated. Cheers.
    x is the length of the base, y is the height:

    \cos \frac{\pi}{4} = \frac{x}{90} \Rightarrow x = ....

    \sin \frac{\pi}{4} = \frac{y}{90} \Rightarrow y = ....
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  3. #3
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    Thanks for the reply. I forgot to mention that I know the answer, I just didn't know how to get it. So the point is (63.63961,63.63961).
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