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Solution 4.3:3e
From Förberedande kurs i matematik 1
Revision as of 09:12, 10 October 2008 by Ian (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 
