Find the exact value of cos -225°

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asked Aug 1, 2021 155k views

1 vote

Find the exact value of cos -225°

Mathematics
middle-school

Vianny asked

by Vianny

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1 Answer

2 votes

Answer:

0.367319368

Explanation:

Without a triangle, you cannot use the law of cosines, or use formulas.

You can plug the value into a calculator to get the answer.

Cedric Morent answered Aug 5, 2021

by Cedric Morent

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