3 years ago

Simplify the following expression:

Mathematics

1 answer:

nalin [4]3 years ago

3 0

-2/2 I think probably

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

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

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