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Virty [35]
2 years ago
14

Given sin 0 and angle 0 is in Quadrant II, what is the exact value of cos 0 in

Mathematics
1 answer:
Anna007 [38]2 years ago
4 0

sin = 3/7

1 = sin²0 + cos²0

cos²0 = 1 - 9/49

cos²0 = 40/49

cos0 = √(40) / 7

since its in Quadrant 2 the sin is positive and cos is negative

cos0 = - √(40) / 7

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2 years ago
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The margin of error is of 0.04.

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Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

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Margin of error:

The margin of error is of:

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This means that n = 230, and that the sample proportion is:

\pi = \frac{202}{230} = 0.88

The sample proportion is 0.88.

Standard 95% confidence level

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3 years ago
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