Asked by hermionee | 4th Feb, 2009, 12:28: AM

Expert Answer:

find the slopes m1 and m2 of the lines then use the formula in the text book for tan theta where theta is the angle between them.

There will be two values because of the modulus. one value gives the acute angle and the other the obtuse angle betwen the lines.

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Answered by  | 4th Feb, 2009, 08:24: AM

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