SOLUTION: If cos A = -1/sqrt(2), determine the possible measures of angle A.

Question 1114122: If cos A = -1/sqrt(2), determine the possible measures of angle A.
Answer by ikleyn(53937) (Show Source): You can put this solution on YOUR website!
.

cos(A) =    ====>


cos(A) =   ====>


A =    or   A = .


Answer.  There are two solutions in the interval [0,):  A =    or   A = .

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