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OpenStudy (anonymous):
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OpenStudy (anonymous):
OpenStudy (anonymous):
help with any of these, they are extra credit
OpenStudy (cwrw238):
second one ;This will help sin( a+b) = sinAcosB + sinsBcosA sin(A-B) = sinAcosB - sinBcosA
OpenStudy (cwrw238):
the above are 2 known identities
OpenStudy (anonymous):
@cwrw238 thanks
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