Lösung 4.2:1f
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Version vom 14:51, 22. Okt. 2008
The side adjacent to the angle of 50° is marked x and the opposite is the side of length 19.
If we write the tangent for the angle, this gives a relation which contains x as the only unknown,
| \displaystyle \tan 50^{\circ} = \frac{19}{x}\,\textrm{.} |
This gives
| \displaystyle x=\frac{19}{\tan 50^{\circ }}\quad ({}\approx 15\textrm{.}9)\,\textrm{.} |
