2 years ago

The answer to this question

Mathematics

1 answer:

Sophie [7]2 years ago

4 0

The answer to this question is D) 13.9 in.

Try using the Pythagorean theorem when solving to get the hypotenuse or other angles for a right triangle.

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Given:

cos 120°

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

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It can be written as

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

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