For the function given, state the starting point for a sample period:

Question

 

a. (-pi/8, 1)

b. (-pi/4, 1)

c. (pi/8, 1)

d. (pi/4, 1)

Answer 1

it must be a sinosoidal function f(x) = Asin(Bx+C) + D

where D = midline= (max-min)/2, A = (min+max)/2, C = horizontal shift, B = pi/period

for sine curve, with 1 as y coordinate, there has to be a phase or horizontal shift of -pi/4

so b seems to be the best answer

although you could do the sinusoidal with cosine curve instead of sine curve and but then there's no phase shift