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Digiron [165]
4 years ago
6

Simplify sec ( t ) cos ( t ) to a single trig function.

Mathematics
1 answer:
Anarel [89]4 years ago
8 0

sec ( t ) cos ( t )  = (1/cos (t)) *cos(t) = 1

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An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the rated voltage for these n
kramer

Answer:

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 232 V

Sample mean, \bar{x} = 231.5 V

Sample size, n = 66

Sample standard deviation, s = 2.19 V

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

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We use Two-tailed t test to perform this hypothesis.

Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n-1}} } Putting all the values, we have

t_{stat} = \displaystyle\frac{231.5- 232}{\frac{2.19}{\sqrt{66}} } = -1.8548

Now,

t_{critical} \text{ at 0.05 level of significance, 9 degree of freedom } = \pm 1.9971

Since,              

|t_{stat}| > |t_{critical}|

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

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3 years ago
The measure of an angle is 60°. What is the measure of its supplementary angle?
SVEN [57.7K]

Answer:

120

Step-by-step explanation:

supplementary equal up 180

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