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Solution 4.3:2a

From Förberedande kurs i matematik 1

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On the unit circle, the angle <math>3\pi/2</math> corresponds to the point (0,-1), and the angle in the interval from <math>0</math> to <math>\pi</math> which has the same cosine value as <math>3\pi/2</math>, i.e. the ''x''-coordinate <math>0</math>, is the angle <math>v = \pi/2\,</math>.
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Current revision

On the unit circle, the angle 32 corresponds to the point (0,-1), and the angle in the interval from 0 to which has the same cosine value as 32, i.e. the x-coordinate 0, is the angle v=2.

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