What is the Trigonometric ratio of cos180?

Jameem asked Sep 18, 2023

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Jameem asked Sep 18, 2023

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19 votes

$\cos 180^(\circ)\\\\=\cos(2 \cdot 90^(\circ))\\\\=2 \cos^2 90^(\circ)-1\\\\=2 \cdot 0 - 1\\\\=0-1\\\\=-1$

Chase Henslee answered Sep 22, 2023

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