Find the EXACT value of sec (-120 degrees)
2 answers:
Well sec(-120) = 1/cos(-120).
We know that cos(-120) = -1/2.
So, 1/(-1/2) = -2.
This means that sec(-120) = -2.
Sec is 1/cos so sec -120 is 1/cos -120 which is -2
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