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OpenStudy (anonymous):
Find all solutions in the interval [0, 2π). 7 tan3x - 21 tan x = 0
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OpenStudy (mertsj):
Is it tan^3 or tan(3x) ?
OpenStudy (anonymous):
tan^3
OpenStudy (mertsj):
Factor out 7tanx
OpenStudy (anonymous):
So is it (7tanx^2x)-(3tanx)=0
OpenStudy (mertsj):
Supposing you have : \[7y^3-21y=0\]
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OpenStudy (mertsj):
Could you factor 7y out of that?
OpenStudy (anonymous):
Yeah
OpenStudy (mertsj):
Do it. What do you get?
OpenStudy (anonymous):
7(y^3)-(3y)
OpenStudy (mertsj):
|dw:1375575312779:dw|
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