Prasenjeet S.

asked • 07/13/14

How to find value

Cos(10).cos(20).cos(40)=?
 
Angles are in Degree 

1 Expert Answer

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Philip P. answered • 07/13/14

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The problem looks like the product of three cosines whose angles are known.  Use your calculator to find the values of cos(10o), cos(20o) and cos(40o) then multiply the values together.
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Prasenjeet S.

I can't use calculator ! this is not the way of solving problem ! Please Solve it in step by order
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07/13/14

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