From Förberedande kurs i matematik 1

Revision as of 07:07, 21 August 2008 (edit) Tekbot (Talk | contribs) m (Robot: Automated text replacement (-[[Bild: +[[Image:)) ← Previous diff		Current revision (14:22, 8 October 2008) (edit) (undo) Tek (Talk | contribs) m
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-	{{NAVCONTENT_START}}	+	The side adjacent to the angle of 50° is marked ''x'' and the opposite is the side of length 19.
-	<center> [[Image:4_2_1f.gif]] </center>	+
-	{{NAVCONTENT_STOP}}	+
	[[Image:4_2_1_f.gif|center]]		[[Image:4_2_1_f.gif|center]]
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		+	If we write the tangent for the angle, this gives a relation which contains ''x'' as the only unknown,
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		+	{{Displayed math||<math>\tan 50^{\circ} = \frac{19}{x}\,\textrm{.}</math>}}
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		+	This gives
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		+	{{Displayed math||<math>x=\frac{19}{\tan 50^{\circ }}\quad ({}\approx 15\textrm{.}9)\,\textrm{.}</math>}}

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Current revision

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{.}