3 years ago

What is the value of sin(80%)cos(20°) - cos(80°)sin(20°)?

Mathematics

2 answers:

den301095 [7]3 years ago

7 0

Answer:

Step-by-step explanation:

joja [24]3 years ago

4 0

Answer:

$\frac{\sqrt{3} }{2}$

Step-by-step explanation:

edge 2020

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Fynjy0 [20]

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3 years ago

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Please help me compute standard deviation! Here is the problem, as written.

aleksandr82 [10.1K]

Answer:

The standard deviation for the income of super shoppers is 76.12.

Step-by-step explanation:

The formula to compute the standard deviation for the grouped data probability distribution is:

$\sigma=\sqrt{\sum [(x-\mu)^{2}\cdot P(x)]}$

Here,

<em>x</em> = midpoints

$\mu=\sum x\cdot P(x)$

Consider the Excel table attached below.

The mean is:

$\mu=\sum x\cdot P(x)=32.3$

Compute the standard deviation as follows:

$\sigma=\sqrt{\sum [(x-\mu)^{2}\cdot P(x)]}$

$=\sqrt{259.71}\\\\=76.1155204\\\\\approx 76.12$

Thus, the standard deviation for the income of super shoppers is 76.12.

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