1 year ago

Gotten two different answers for my homework problem here. Is it 18 or 55?

Mathematics

1 answer:

stellarik [79]1 year ago

8 0

Answer:

Explanation:

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1 + 1x

1 + x

They mean the same thing! Hope this helps!

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Which expression is equivalent to (sin x + 1)(sin x − 1)? A. cos2x B. -cos2x C. cos2x + 1 D. cos2x − 1 E. -cos2x + 1

Semenov [28]

ANSWER

$- \cos^{2} x$

EXPLANATION

The given expression is

(sin x + 1)(sin x − 1)

Note that:

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This implies that,

$( \sin \: x + 1)( \sin \: x - 1) = \sin^{2} x - 1$

We can factor -1 on the right hand side to get,

$( \sin \: x + 1)( \sin \: x - 1) = - (1 - \sin^{2} x )$

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We apply this identity to obtain:

$( \sin \: x + 1)( \sin \: x - 1) = - \cos^{2} x$

The correct choice is B

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In the function y = .08x + 5, y represents the cost of water per gallons and x represents the number of gallons. How much does t

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ArbitrLikvidat [17]

Answer:

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Step-by-step explanation:

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