Solution 4.2:2f
From Förberedande kurs i matematik 1
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- | + | 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. | |
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[[Image:4_2_2_f.gif|center]] | [[Image:4_2_2_f.gif|center]] | ||
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+ | If we look at one of the triangles, we can set up the trigonometrical relation | ||
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+ | {{Displayed math||<math>\sin\frac{v}{2} = \frac{1}{3}\,,</math>}} | ||
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+ | which is an equation for ''v''. |
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.