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Solution 4.4:3b

From Förberedande kurs i matematik 1

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m (Lösning 4.4:3b moved to Solution 4.4:3b: Robot: moved page)
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{{NAVCONTENT_START}}
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We see directly that
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<center> [[Image:4_4_3b.gif]] </center>
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<math>x=\frac{\pi }{5}</math>
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{{NAVCONTENT_STOP}}
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is a solution to the equation, and using the unit circle we can also draw the conclusion that
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<math>x=\pi -\frac{\pi }{5}=\frac{4\pi }{5}</math>
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is the only other solution between
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<math>0</math>
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and
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<math>\text{2}\pi </math>.
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[[Image:4_4_3_b.gif|center]]
[[Image:4_4_3_b.gif|center]]
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We obtain all solutions to the equation when we add integer multiples of
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<math>\text{2}\pi </math>,
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<math>x=\frac{\pi }{5}+2n\pi </math>
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and
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<math>x=\frac{4\pi }{5}+2n\pi </math>
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where
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<math>n</math>
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is an arbitrary integer.

Revision as of 09:43, 1 October 2008

We see directly that x=5 is a solution to the equation, and using the unit circle we can also draw the conclusion that x=−5=54 is the only other solution between 0 and 2.


We obtain all solutions to the equation when we add integer multiples of 2,


x=5+2n and x=54+2n


where n is an arbitrary integer.

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