SOLUTION: Determine the exact value of cos19π/12. Link to equation composition: https://gyazo.com/d7755bad6f1fbcbd33326a285055204f

Question 1205303: Determine the exact value of cos19π/12.
Link to equation composition: https://gyazo.com/d7755bad6f1fbcbd33326a285055204f
Answer by ikleyn(52907) (Show Source): You can put this solution on YOUR website!
.
Determine the exact value of cos19π/12.
~~~~~~~~~~~~~~~~~~~~~

 =  + .


Therefore,

     =  =  -  = 

  =  -  =  -  = .


Next,  = .


Therefore,   =  =  =  = .  


Combining everything together, we get the 


ANSWER.   = .

Solved.

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