Amena2000 Amena2000

03-04-2017
Mathematics

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Can someone explain how the solution doesnt have a negative answer i.e (-pi/3)

Can someone explain how the solution doesnt have a negative answer ie pi3 class=

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N3gat1veZer0 N3gat1veZer0

03-04-2017

As far as I can tell you are correct. The correct answer for x should be
-pi/3

If you plug x=+pi/3 into the expression cos(x/2 + pi/6), it ends i equaling 1/2, not 0.

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Derivative of x^2 •root x