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Solution 4.3:3e
From Förberedande kurs i matematik 1
Revision as of 12:22, 10 October 2008 by Tek (Talk | contribs)
The angle 2+v makes the same angle with the positive y-axis as the angle v makes with the positive x-axis, and hence we see that the x-coordinate for 2+v is equal to the y-coordinate for v, but with a change of sign, i.e.
2+v
=−sinv=−a. 
