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How do you find the angle of a cosine?

In: Math and Arithmetic, Algebra, Geometry [Edit categories]

Answer:

You mean, you have the cosine, and want the angle? That is called arc-cosine, often written as cos^-1x. Your scientific calculator should have a "shift" key or something similar, which you press, followed by the cosine key. That will give you the inverse cosine or arc-cosine.

First answer by Hilmarz. Last edit by Hilmarz. Contributor trust: 802 [recommend contributor ]. Question popularity: 1 [recommend question].

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