3 years ago

HELP ME HELP ME PLEASEEE

1 answer:

7 0

I got 29.2 (I also rounded it to the nearest tenth for u)

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The common factors of 15, 18, and 12 are 1 and 3

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Answer:

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PilotLPTM [1.2K]

Answer:

Step-by-step explanation:

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Andrew [12]

Here's the answer! Hope it helps!

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3 years ago

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 $-\dfrac{1}{2}$ .

7 0

3 years ago