SOLUTION: find the exact value cos(n/6)cos(n/12)-sinx(n/6)sin(n/12)

Question 1105168: find the exact value
cos(n/6)cos(n/12)-sinx(n/6)sin(n/12)
Answer by ikleyn(52786) (Show Source): You can put this solution on YOUR website!
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find the exact value cos(n/6)cos(n/12)-sinx(n/6)sin(n/12)
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  cos(n/6)cos(n/12)-sinx(n/6)sin(n/12) = apply the addition formula for cosine =


=  =  =  = . 


Next,  I assume that "n" is actually "pi" =    (n is a way how the author of the post writes  )  and then  


 =  = .

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