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vampirchik [111]

2 years ago

10

Mr.Falcons pizza shop offers two sizes of pizza. The XL large and XXL pizza with diameters of 20 inches and 22 inches. What is t

he difference between the two pizza?

1 answer:

Scilla [17]2 years ago

8 0

Answer:

one is 2 inches bigger that the other.

Step-by-step explanation:

becuase if one of the pizza is 20in ans the other is 22 the 20 on is only 2in away frof the XXL pizza .

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Annette [7]

Option A

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<em><u>Solution:</u></em>

Given that we have to rewrite with only sin x and cos x

Given is cos 3x

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We know that,

$\cos (a+b)=\cos a \cos b-\sin a \sin b$

Therefore,

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We know that,

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$\cos 2 x=\cos ^{2} x-\sin ^{2} x$

Substituting these values in eqn 1

$\cos (x+2 x)=\cos x\left(\cos ^{2} x-\sin ^{2} x\right)-\sin x(2 \sin x \cos x)$ -------- eqn 2

We know that,

$\cos ^{2} x-\sin ^{2} x=1-2 \sin ^{2} x$

Applying this in above eqn 2, we get

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

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Option A is correct

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8_murik_8 [283]

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erma4kov [3.2K]

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Step-by-step explanation:

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1 year ago