Evaluate 2 times 3 to the power of 2 minus 5
2 answers:
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This question is asking "Where does cosine equal 
?"
Based on our unit circle values and the domain of the cos^{-1} function, we see that at 30 degrees, or
, cosine is equal to .
Based on our unit circle values and the domain of the cos^{-1} function, we see that at 30 degrees, or