Topic: non-collinear list of topics
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2 items are filed under this topic.

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	A trig problem		2014-04-25
		From srishti: Consider the points P= (-sin(a-b),-cosa), Q=(cos(a-b),sina), R=(cos(a-b+c),sin(a-c), where 0 Answered by Chris Fisher.
	What is the angle between 2 non-collinear parallel lines?		2005-10-17
		From Ben: What is the angle (if any) between 2 non-collinear parallel lines? Answered by Chris Fisher and Walter Whiteley.

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