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OpenStudy (anonymous):
find the exact value of sin (-120)
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OpenStudy (anonymous):
I answered this :(
OpenStudy (anonymous):
no you didnt.. thats wrong
OpenStudy (anonymous):
Well, you need to know the exact value of sin(60), obviously, but I assumed you did...
OpenStudy (anonymous):
If not, draw a triangle with angles 30, 60 and 90 (half an equilateral)
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