The diagram shows part of the equation y=f(x), where f(x)=1+2sin(px+q), p and q being positive constants and q≤90. The curve cuts the y-axis at the point A and the x-axis the points C and D. The point B is a maximum point on the curve.
Given that the coordinates of the point A and C are (0,2) and (45,0) respectively
>> calculate the value of q >> show that p=4 >> fine the coordinates of B and D
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