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Given the function f(t) = 1/2cos (pi/3 *t) +3pi^2. Which of the following is equal to...

Given the function f(t) = 1/2cos (pi/3 *t) +3pi^2. Which of the following is equal to f'(t)

f'(t) = 1/2sin(pi/3 t) +6pi

f'(t) = -pi/3cos(pi/3 *t)

f'(t) = -pi/6 sin(pi/3 T)

f'(t) = pi/3 sin(pi/3 t) +6pit

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