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Cos of 850 degrees?

850 deg = 130 + 360*2 = 130 deg

By the graph of the cosine: cos(130) = -cos(50)

and cos(50) is not a fraction of a root.

cos(50) = 0.6427876...

Therefore, cos(850) = -0.6427876...

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14y ago
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Q: What is cosine 850?
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