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Solution 4.3:1c

From Förberedande kurs i matematik 1

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Line 7: Line 7:
-axis.
-axis.
-
slope =
+
 
-
<math>{\tan 2\pi }/{7}\;</math>
+
 
-
FIGURE1 slope =
+
<center> [[Image:4_3_1_c.gif]] </center>
 +
 
 +
slope =
<math>{\tan 2\pi }/{7}\;</math>
<math>{\tan 2\pi }/{7}\;</math>
-
FIGURE2
 
From the figure, we see that the angle between
From the figure, we see that the angle between
Line 20: Line 21:
<math>{2\pi }/{7}\;</math>
<math>{2\pi }/{7}\;</math>
is
is
-
<math>{v=2\pi }/{7}\;+\pi ={9\pi }/{7}\;</math>
+
<math>{v=2\pi }/{7}\;+\pi ={9\pi }/{7}\;</math>.
-
.
+

Revision as of 10:19, 29 September 2008

The tangent value of the angle 27 is the gradient of the line which makes an angle 27 with the x -axis.


Image:4_3_1_c.gif

slope = tan27

From the figure, we see that the angle between 2 and 2 which gives a line with the same slope as the angle 27 is v=27+=97.

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