Solution 4.3:1c
From Förberedande kurs i matematik 1
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- | The tangent value of the angle | + | The tangent value of the angle <math>2\pi/7</math> is the slope of the line which makes an angle <math>2\pi/7</math> with the ''x'' -axis. |
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- | + | [[Image:4_3_1_c.gif||center]] | |
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- | From the figure, we see that the angle between | + | From the figure, we see that the angle between <math>\pi/2</math> and <math>2\pi</math> which gives a line with the same slope as the angle <math>2\pi/7</math> is <math>v = 2\pi/7 + \pi = 9\pi/7\,</math>. |
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- | <math>2\pi </math> | + | |
- | which gives a line with the same slope as the angle | + | |
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Current revision
The tangent value of the angle \displaystyle 2\pi/7 is the slope of the line which makes an angle \displaystyle 2\pi/7 with the x -axis.
From the figure, we see that the angle between \displaystyle \pi/2 and \displaystyle 2\pi which gives a line with the same slope as the angle \displaystyle 2\pi/7 is \displaystyle v = 2\pi/7 + \pi = 9\pi/7\,.