Posted by elai on October 19, 2008
This entry was posted on October 19, 2008 at 8:06 pm and is filed under Block G Problems.
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October 30th, 2008 at 8:58 pm
i found it really helpful when at about 2 minutes you kind of summarised everything you did, it really helped me understand. But the one thing i didn’t get is where you got the triangle and the angles at about 3:30, was it the one from the problem or just some random triangle?
November 1st, 2008 at 2:16 pm
At 3:31,you tried to explain where you get the (-1/√2), saying that it came from the “special” triangle. Where did the the triangle come from in the diagram? Other than this, a job well done on the presentation.
November 1st, 2008 at 4:34 pm
when you try to explain how you get the cosine: negative 1 over root 2, you draw a triangle, but how do you know the bottom is negative 1 ?
November 1st, 2008 at 4:48 pm
I would just like to clarify whether the line segment, 3t, is from J to C or J to H? Also, if you use the quadratic formula (-b+/-rootb^2-4ac)/ 2a) to solve for t, then shouldn’t you have 2 answers?