From Förberedande kurs i matematik 1

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-	{{NAVCONTENT_START}}	+	The definition of the tangent states that
-	<center> [[Image:4_2_1a.gif]] </center>	+
-	{{NAVCONTENT_STOP}}	+	{| width="100%"
-	[[Image:4_2_1_a.gif|center]]	+	| width="50%" align="center"|<math>\tan u=\frac{\text{opposite}}{\text{adjacent}}</math>
		+	| width="50%" align="center"|[[Image:4_2_1_a.gif]]
		+	|}
		+
		+	In our case, this means that
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		+	{{Displayed math||<math>\tan 27^{\circ} = \frac{x}{13}</math>}}
		+
		+	which gives <math>x = 13\cdot \tan 27^{\circ}\,</math>.
		+
		+
		+	Note: Using a calculator, we can work out what ''x'' should be,
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		+	{{Displayed math||<math>x = 13\cdot\tan 27^{\circ} \approx 6\textrm{.}62\,\textrm{.}</math>}}

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Current revision

The definition of the tangent states that

\displaystyle \tan u=\frac{\text{opposite}}{\text{adjacent}}

In our case, this means that

\displaystyle \tan 27^{\circ} = \frac{x}{13}

which gives \displaystyle x = 13\cdot \tan 27^{\circ}\,.

Note: Using a calculator, we can work out what x should be,

\displaystyle x = 13\cdot\tan 27^{\circ} \approx 6\textrm{.}62\,\textrm{.}