2 years ago

Evaluate. Write your answer as a fraction or whole number without exponents 2^-4

1 answer:

4 0

The answer is 1/16

Since 2^4 = 16, 2^-4 = 1/16 because of the negative exponent. Let me know if you need me to explain is some more!

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Vikki [24]

This follows directly from the double angle identity for cosine and the Pythagorean identity:

$\cos2\theta=\cos^2\theta-\sin^2\theta=\begin{cases}2\cos^2\theta-1\\1-2\sin^2\theta\end{cases}$

So we have

$\dfrac{1-2\sin^2\theta}{2\cos^2\theta-1}=\dfrac{\cos2\theta}{\cos2\theta}=1$

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Tasya [4]

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Step-by-step explanation:

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algol [13]

Answer:

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Step-by-step explanation:

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1 year ago

nevsk [136]

Answer:

Step-by-step explanation:

Subtract 100 from both sides to get x by itself.

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(Another way of writing this is "263 - 100 = " like you would see in elementary school.)

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2 years ago

galben [10]

Answer:

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Step-by-step explanation:

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2 years ago