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3 years ago

Complete the identity sin(2θ) sin(4θ) cos(2θ) cos(4θ) = ?

Mathematics

1 answer:

Novay_Z [31]3 years ago

4 0

Answer:

Step-by-step explanation:

Factor the left hand side as a difference of squares:

(

cos

sin

)

(

cos

−

sin

)

cos

−

sin

Apply the pythagorean identity

cos

sin

(

cos

−

sin

)

cos

−

sin

cos

−

sin

cos

−

sin

Hopefully this helps!

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In the spinner below, what is the probability of landing

gizmo_the_mogwai [7]

Answer:

1/4

Step-by-step explanation:

There are 4 equal sized sections, and 2 sections that are twice the size of the others ( 2*2=4), for a total of 8 sections

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3 years ago

-3+7x-9+8x=54 please help

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X = 22/4

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4 years ago

When testing a claim that the majority of adult Americans are against the death penalty for a person convicted of murder, a rand

Black_prince [1.1K]

Using the z-distribution, it is found that the p-value is of 1.

At the null hypothesis, it is tested that the majority is not against the death penalty, that is:

$H_0: p \neq 0.5$

At the alternative hypothesis, it is tested that the majority is against the death penalty, that is:

$H_1: p > 0.5$

The test statistic is given by:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

In which:

$\overline{p}$ is the sample proportion.

p is the proportion tested at the null hypothesis.

n is the sample size.

In this problem, the parameters are: $\overline{p} = 0.27, p = 0.5, n = 491$ .

Then, the value of the test statistic is:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

$z = \frac{0.27 - 0.5}{\sqrt{\frac{0.5(0.5)}{491}}}$

$z = -10.19$

Using a z-distribution calculator, for a right-tailed test, as we are testing if the proportion is greater than a value, the p-value is of 1.

A similar problem is given at brainly.com/question/16313918

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3 years ago