perplexus.info :: Just Math : Rotating slopes

Rotating slopes (Posted on 2006-03-21)

Given a line with slope y/x, find a simple formula for the slope of a second line that forms a 45 degree angle with this line (find slopes for both 45 degrees more and 45 degrees less.)
This can be done without trigonometry.

Find a general formula for any angle.
This requires trigonometry.

See The Solution Submitted by Jer

Rating: 3.2000 (5 votes)

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
re(2): Solution - how do you use it?	Bractals	2006-03-22 17:59:09
re: Solution - how do you use it?	Jer	2006-03-22 14:25:41
simple solution	Tristan	2006-03-21 19:25:34
Solution	Bractals	2006-03-21 16:39:26
Solution	tomarken	2006-03-21 15:59:16

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