Lösung 4.3:3a
Aus Online Mathematik Brückenkurs 1
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Version vom 15:02, 22. Okt. 2008
The angle \displaystyle -v is the reflection of the angle \displaystyle v in the x-axis, and under such reflection the x-coordinate does not change, whereas the y-coordinate changes sign. This means that if \displaystyle \sin v = a\,, then \displaystyle \sin (-v) = -a\,.
