SOLUTION: What is the exact value of cos x = -1/3. Show work. This actually comes from a much larger question, solve algebraically and give general solution in radians to {{{ 3 sin^2 (x)

Question 902198: What is the exact value of cos x = -1/3. Show work.
This actually comes from a much larger question, solve algebraically and give general solution in radians to . Once I get to the factors of (3cos x +1) and (cos x - 2), I know that x cannot equal 2, so that leaves cos x = -1/3. I need the exact values for this, in terms of the unit circle.
Thanks, much appreciated!
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Use the inverse cosine or acos button on your calculator.
degrees and
degrees
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