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3 years ago

Need Help....

Mathematics

2 answers:

natali 33 [55]3 years ago

5 0

Answer:

$the \: expession \: is \: equivalent \: to \: 2$

$to \: know \: the \: solution \: with \: explanation$

$refer \: to \: the \: above \: attatchment$

<h3>Carry on learning !! </h3>

Alecsey [184]3 years ago

3 0

If 0 < x < π/2, then both sin(x) and cos(x) are positive.

From the Pythagorean identity, we then have

cos²(x) + sin²(x) = 1

⇒ cos(x) = + √(1 - sin²(x)) and sin(x) = + √(1 - cos²(x))

Then

√(1 - cos²(x))/sin(x) = sin(x)/sin(x) = 1

and

√(1 - sin²(x))/cos(x) = cos(x)/cos(x) = 1

so that the overall expression reduces to

1 - 1 = 0

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A company has developed a new type of light bulb, and wants to estimate its mean

BARSIC [14]

Answer:

628

Step-by-step explanation:

We have the standard deviation of the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 12 - 1 = 11

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 11 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975$ . So we have T = 2.2

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 2.2\frac{59}{\sqrt{12}} = 37$

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The answer is 628

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3 years ago

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Jet001 [13]

Answer:

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Step-by-step explanation:

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3 years ago

The short sides of a rectangle are 2 inches. The long sides of the same rectangle are three less than an unknown number of inche

Marat540 [252]

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