SOLUTION: Find the exact value of s in the given interval that has the circular function value. [pi/2, pi]; cos s=-1/2. S= Radians?

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Question 1191379: Find the exact value of s in the given interval that has the circular function value. [pi/2, pi]; cos s=-1/2.
S= Radians?

Answer by math_helper(2461) About Me  (Show Source):