From Förberedande kurs i matematik 1

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-	{{NAVCONTENT_START}}	+	Because the triangle is isosceles (two sides have the same length), it can be divided up into two right-angled triangles of the same size by introducing a side which divides the angle ''v'' in half.
-	<center> [[Bild:4_2_2f.gif]] </center>	+
-	{{NAVCONTENT_STOP}}	+	[[Image:4_2_2_f.gif|center]]
-	[[Bild:4_2_2_f.gif|center]]	+
		+	If we look at one of the triangles, we can set up the trigonometrical relation
		+
		+	{{Displayed math||<math>\sin\frac{v}{2} = \frac{1}{3}\,,</math>}}
		+
		+	which is an equation for ''v''.

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Current revision

Because the triangle is isosceles (two sides have the same length), it can be divided up into two right-angled triangles of the same size by introducing a side which divides the angle v in half.

If we look at one of the triangles, we can set up the trigonometrical relation

\displaystyle \sin\frac{v}{2} = \frac{1}{3}\,,

which is an equation for v.