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trigonometry equation
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Solving a trig equation 2010-04-21
From Jason:
Please Help! My question is :

Find all of the solutions to sin(x/2)+cosx-1=0
Answered by Penny Nom.
A problem with arccos. 1997-06-09
From Vanessa Chan:
Prove: arc cos4/5 + arc cos (-5/13) = arc cos (-56/65)
Answered by Harley Weston.
 
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