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OpenStudy (anonymous):
Rewrite with only sin x and cos x. sin 3x - cos x
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OpenStudy (tkhunny):
Have you considered using \(\sin(a+b) = \sin(a)\cos(b) + \cos(a)\sin(b)\)?
OpenStudy (anonymous):
Yes I have but I am still like.. Unsure as to how to get the answer
OpenStudy (anonymous):
@tkhunny
OpenStudy (anonymous):
Would it just be sin(3x-x) which is sin(2x)? @tkhunny
OpenStudy (anonymous):
woops. sorry. i meant sin(3x+x) which is sin (4x) @tkhunny
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OpenStudy (anonymous):
@jim_thompson5910
OpenStudy (anonymous):
@ganeshie8 @mathstudent55
OpenStudy (tkhunny):
\(\sin(3x) = \sin(x + 2x)\)
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