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3 years ago

10

Victor has 1 and a half hours before he has to leave. He starts watching a movie that runs for 107 minutes. How many minutes of

the movie will he miss?

1 answer:

Phoenix [80]3 years ago

6 0

He does not miss any of the movie

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A regular nonagon has a perimeter of 36 cm and an

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2.56

Step-by-step explanation:

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3 years ago

The entertainment committee voted to hire a DJ for the school dance. The DJ

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A 4 hours

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3 years ago

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The Glendale Plaza Building in Glendale, California, is 353 feet tall. The U.S. Bank Tower in Los Angeles, California, is 1,017

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Step-by-step explanation:

I hope this helps

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3 years ago

Show that cos(3x) = cos3(x) − 3 sin2(x)cos(x). (Hint: Use cos(2x) = cos2(x) − sin2(x) and the cosine sum

otez555 [7]

<u>Step-by-step explanation:</u>

To prove:

$\cos 3x=\cos^3x-3\sin^2 x\cos x$

Identities used:

$\cos(A+B)=\cos A\cos B+\sin A\sin B$ ......(1)

$\sin 2A=2\sin A\cos A$ ........(2)

$\cos 2A=\cos^2A-\sin^2 A$ .......(3)

Taking the LHS:

$\Rightarrow \cos 3x=\cos (x+2x)$

Using identity 1:

$\Rightarrow \cos (x+2x)=\cos x\cos 2x-\sin x\sin 2x$

Using identities 2 and 3:

$\Rightarrow \cos x(\cos ^2x-\sin^2 x)-\sin x(2\sin x\cos x)\\\\\Rightarrow \cos^3x-\sin^2x\cos x-2\sin^2 x\cos x\\\\\Rightarrow \cos^3x-3\sin^2x\cos x$

As, LHS = RHS

Hence proved

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2 years ago

Which of the following decimals is equivalent to three and ten hundreths?

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3.01 is the correct answer

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3 years ago

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