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wlad13 [49]
3 years ago
12

Which of the following best corresponds to the x-value where the function f(x)=cos x is a minimum in the interval x=|25,30|

Mathematics
1 answer:
Aloiza [94]3 years ago
3 0
Answer: On the interval [25, 30] the function y = cos x is at it's minimum at x = 9pi or about 28.26.

The graph of y = cos x starts at 1 and moves in the shape of a wave from -1 to 1. It reaches it's first minimum value when x = pi. The period of the wave is 2 pi.

Therefore, it is at its lowest value at the following values, 1pi, 3pi, 5pi, 7pi, 9pi... The value in our given interval is 9pi.
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Hello from MrBillDoesMath!

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-3z -6 = -5z -8                =>  add 6 to both sides

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