What is the cos(t) if t corresponds to the point (-2, 0)? 0 1 -1 Undefined

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asked Aug 23, 2019 62.4k views

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Jtimperley · Answer 1 · 2019-08-29T23:03:56+0000

The cosine is the x-coordinate of the point on the unit circle at the angle of interest. It seems your point (-2, 0) corresponds to an angle of 180°. The ray through (-2, 0) from the origin intersects the unit circle at (-1, 0).
cos(t) = -1

What is the cos(t) if t corresponds to the point (-2, 0)? 0 1 -1 Undefined-example-1

What is the cos(t) if t corresponds to the point (-2, 0)? 0 1 -1 Undefined

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