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The brightness of certain stars can fluctuate over time. Suppose that the brightness of one such star is given by the following function. B(t)= 11.1

The brightness of certain stars can fluctuate over time. Suppose that the brightness of one such star is given by the following function.

B(t)= 11.1 - 1.5 cos 0.12t

find

period of B

Frequency of B

Mininum brightness

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