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OpenStudy (explainitlikeimfive):
Express the sum or difference as a product. sin 4x - sin 6x
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OpenStudy (explainitlikeimfive):
OpenStudy (anonymous):
\[\sin 4x-\sin 6x=-\left( \sin 6x-\sin 4x \right)=-2\cos \frac{ 6x+4x }{ 2 }\sin \frac{ 6x-4x }{ 2 } \] \[=-2\cos 5x \sin x\]
OpenStudy (explainitlikeimfive):
So I reckon I'd pick C?
OpenStudy (anonymous):
yes
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