From Förberedande kurs i matematik 1

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-	{{NAVCONTENT_START}}	+	The opposite and adjacent are given in the right-angled triangle and this means that the value of the tangent for the angle can be determined as the quotient between the opposite and the adjacent:
-	<center> [[Image:4_2_2a.gif]] </center>	+
-	{{NAVCONTENT_STOP}}	+	{| width="100%"
-	[[Image:4_2_2_a.gif|center]]	+	| width="50%" align="center"|<math>\tan v = 2/5</math>
		+	| width="50%" align="left"|[[Image:4_2_2_a.gif]]
		+	|}
		+
		+	At the same time, this is a trigonometric equation for the angle ''v''.
		+
		+
		+	Note: In the chapter on "Trigonometric equations", we will investigate more closely how to solve equations of this type.

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Current revision

The opposite and adjacent are given in the right-angled triangle and this means that the value of the tangent for the angle can be determined as the quotient between the opposite and the adjacent:

\displaystyle \tan v = 2/5

At the same time, this is a trigonometric equation for the angle v.

Note: In the chapter on "Trigonometric equations", we will investigate more closely how to solve equations of this type.