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11 December, 20:07

Which function's graph has a period of 2?

y=cos (x-pi/2)

y=3cos pi x

y=2 sin 3x

y=-4 sin 2x

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Answers (1)
  1. 11 December, 23:25
    0
    If the function is:

    y=a cos (bx+c), or y=a sin (x+c)

    then the period is T = 2π/b and if T=2:

    2=2π/b

    b=2π/2=π

    Answer: B) y=3 cos πx
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