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OpenStudy (anonymous):
find the exact value of sin(120) by using sin(180-60)
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OpenStudy (mertsj):
sin(x-y)=sinxcosy -cosxsiny
OpenStudy (anonymous):
so you would put 180 as sin of x and 60 as cos x
OpenStudy (mertsj):
Replace x with 180. Replace y with 60.
OpenStudy (anonymous):
THNAKS ALOT!!! really helpful!
OpenStudy (mertsj):
yw
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