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Solution 4.2:1d

From Förberedande kurs i matematik 1

Revision as of 11:08, 28 September 2008 by Ian (Talk | contribs)
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The side marked x is the hypotenuse in the right-angled triangle and the side of length 16 is the adjacent to the angle of 20.


By writing the quotient for cos20, we obtain the relation


cos20=x16


and this gives


x=16cos20170