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3 years ago

The table shows the derivation of cos(2x). Select the correct reason for each step.

Mathematics

2 answers:

V125BC [204]3 years ago

7 0

Answer:

Addition, cosine sum identity, simplify

Step-by-step explanation:

edge2020

marshall27 [118]3 years ago

5 0

Answer:

Reason 1 is: Addition

Reason 2 is: Sine Sum Identity

Reason 3 is: Simplify

Step-by-step explanation:

just did it on edge

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4 years ago

Find each measure plz help

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Answer:

m∠QRS = 52°

Step-by-step explanation:

From the given figure,

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

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An analyst must decide between two different forecasting techniques for weekly sales of roller blades: a linear trend equation a

Amiraneli [1.4K]

Answer:

Following are the responses to the given question:

Step-by-step explanation:

Mean Absolute Deviation MAD

$MAD = \sum_{i=1}^{n} \frac{\left | actual_{i}-forecast_{i} \right |}{n}$

Mean squared error

$MSE=\Sigma^{n}_{i=1} \frac{(Actual_i - Forecast_i)^2}{(n - 1)}$

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Naive method

$MAD = \frac{36}{9} = 4\\\\MSE = \frac{202}{8}=25.25\\\\MAD (Naive) = 4\\\\MAD (Linear) =2.3\\\\MSE (Naive)=25.25\\\\MSE (Linear)=10.11\\\\$

Please find the attached file.

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3 years ago