Question 1153893: Y=sin(2x+phi/3)
Find
The x-coordinate of the point A where the curve cuts the x axis
Found 2 solutions by Cromlix, ikleyn:
Answer by Cromlix(4381)   (Show Source):
You can put this solution on YOUR website! Hi,
Where a curve cuts the x axis you make y = 0
Where a curve cuts the y axis you make x = 0
Y = sin(2x + pi/3)
sin(2x + pi/3) = 0
2x + pi/3 = 0, pi, 2pi, 3pi and 4pi (Extra angles due to presence of 2x)
2x = -pi/3, 2pi/3, 5pi/3, 8pi/3 and 11pi/3
x = -pi/6, pi/3, 5pi/6 4pi/3 and 11pi/6
I dont know your limits, but think it would be 0 <= x =<2pi
So A is liable to be pi/3.
Hope this helps. :-)
Answer by ikleyn(52781)  (Show Source):
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