Math

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What value for function y=3cos(t-pi) + 2 gives an instantaneous rate of change of 0?

a) 0
b) pi/2
c) pi/3
d) pi/4

  • Math -

    pi/3

  • Math -

    dy/dx = -3 sin(t-π)

    =0
    sin(t-π) = 0
    t-π = 0 , or t-π = π or t-π = 2π

    t = ... -3π, -2π, -π , 0 , π, 2π , 3π . .

  • Math -

    Answer is 0, right?

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