3 years ago

A) Complete the table of values for y = x2 - 4x

Mathematics

1 answer:

Elis [28]3 years ago

5 0

Answer:

Step-by-step explanation:

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Vikki [24]

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

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So we have

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

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