3 years ago

A store sold 6 fruit trees. Five of the trees were apple trees.

Mathematics

1 answer:

slava [35]3 years ago

3 0

5/6 of the trees were apple trees

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Find the exact value of cos 120° in simplest form with a rational<br> denominator.

IRINA_888 [86]

Given:

cos 120°

To find:

The exact value of cos 120° in simplest form with a rational denominator.

Solution:

We have,

$\cos 120^\circ$

It can be written as

$\cos 120^\circ=\cos (90^\circ+30^\circ)$

$\cos 120^\circ=-\sin 30^\circ$ $[\because \cos (90^\circ-\theta)=-\sin \theta]$

$\cos 120^\circ=-\left(\dfrac{1}{2}\right)$ $[\because \sin 30^\circ=\dfrac{1}{2}]$

$\cos 120^\circ=-\dfrac{1}{2}$

Therefore, the exact value of cos 120° is $-\dfrac{1}{2}$ .

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leva [86]

Answer:

i pray you get it right lol

Step-by-step explanation:

just ask a teacher

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zimovet [89]

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Step-by-step explanation:

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5x+2=5x+2 has how many solutions?

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masya89 [10]

Look over all of the possible answers. If any of them contains either M or N or both, the result is irrational. There's one exception: N^2 produces a rational number because the radical disappears.

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