Wednesday, November 26, 2014

Find out the biggest element in the set { cos1, cos2, cos3 } .

We need to determine the biggest value among cos1, cos2, and cos3


Since 1 is in the first quadrant, then the cosine is positive, then cos1? 0


However, 2 belongs to the interval (pi/2, pi) =(3.14/2, 3.14)which is in the 2nd quadrant where the cosine is negative ,


then cos2<0


Also, 3  belongs to the interval (pi/2, pi)  where cosine is negative.


Then cos1 is the biggest value.

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