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What is the exact value of the trigonometric expression in simplest form?

 Feb 17, 2018
 #1
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tan (2pi / 3)  = - tan (60°)   = -√3

 

cos ( 11 pi / 6 )  =  cos (30°)  =  √3 / 2

 

 

So....substituting, we have

 

-√3 +  4 (√3 / 2 )  =

 

-√3  + 2√3  =

 

√3

 

 

cool cool cool

 Feb 17, 2018

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