SOLUTION: What is the exact value of sec180°?

Algebra.Com
Question 832066: What is the exact value of sec180°?
Answer by hovuquocan1997(83)   (Show Source): You can put this solution on YOUR website!
Cos180=-1
Sec180 = 1/cos180 = 1/-1 = -1
TA-DAH
:D

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