1 year ago

7 time 45 please i need help this for the class

1 answer:

8 0

315 is the answer pls give brainly

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malfutka [58]

Answer:

Step-by-step explanation:

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2 years ago

Ivahew [28]

$9\cos(2t)=6\implies\cos(2t)=\dfrac23$

Using the fact that cos is 2π-periodic, we have

$\cos(2t)=\dfrac23\implies2t=\cos^{-1}\left(\dfrac23\right)+2n\pi$

That is, $\cos(\theta+2n\pi)=\cos\theta$ for any $\theta$ and integer $n$ .

$\implies t=\dfrac12\cos^{-1}\left(\dfrac23\right)+n\pi$

We get 2 solutions in the interval [0, 2π] for $n=0$ and $n=1$ ,

$t=\dfrac12\cos^{-1}\left(\dfrac23\right)\text{ and }t=\dfrac12\cos^{-1}\left(\dfrac23\right)+\pi$

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2 years ago

Zigmanuir [339]

$\sqrt{x} = 25 \: (square \: both \: side) \\ {( \sqrt{x} )}^{2} = {25}^{2} \\ x = 625 \\ test \\ \\ \sqrt{625} = 25$

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2 years ago

Sveta_85 [38]

A solution to a division problem means it is the quotient. And it tells us the solution to the dividend and divisor.

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2 years ago

Aleksandr [31]

Answer:

Step-by-step explanation:

You can multiply both sides on an equation by the reciprocal to cancel the fraction on the first side.

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1 year ago