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yaroslaw [1]
4 years ago
4

Which expression is equivalent to cos120°?

Mathematics
1 answer:
7nadin3 [17]4 years ago
5 0
I hope this helps you



cos120=cos(180-60)= -cos60


cos120 =cos(90+30)= sin30
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Using the ratio of perfect squares method, what is square root of 53 rounded to the nearest hundredth?
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Step-by-step explanation:

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Step-by-step explanation:

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4 0
3 years ago
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Norma-Jean [14]

Answer:

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Hi

Leon do the work in 17 hours that means the rate of his work is \frac{1}{17} work/hr, so he do \frac{2}{17} of the work in two hours, therefore Michael do the other \frac{15}{17} of the work, thus Michael rate will be \frac{15}{17} \div\frac{1}{2} =\frac{30}{17} work/hour.

So it takes Michael 1h+\frac{4}{17}h to complete the work, or \frac{4h}{17} \times \frac{60min}{1hour} =14\frac{2}{17} min\\\\\frac{2}{17} min \times \frac{60 secs}{1min}=7secs

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Step-by-step explanation:

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