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OpenStudy (anonymous):
If the sin 30° = , then the cos 60° = _____.
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OpenStudy (anonymous):
you didnt say anything,you just put = sign
OpenStudy (anonymous):
\[\sin 30=t\] \[\cos 60=\sin (90-60)=\sin 30=t\]
OpenStudy (anonymous):
because SIN A = COS(90 - A) COS A = SIN(90 - A)
OpenStudy (anonymous):
Oh sorry! it's = 1/2
OpenStudy (anonymous):
@jdoe0001
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