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Solution 4.3:3f

From Förberedande kurs i matematik 1

Revision as of 11:34, 29 September 2008 by Ian (Talk | contribs)
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In this case, it is perhaps simplest to use the addition formula for sine,


sin3+v=sin3cosv+cos3sinv 

Since sin3=23  cos3=21  sinv=a , and cosv=1−a2  this can be written as


sin3+v=231−a2+21a 

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