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

0
1
-1
Undefined

User JSWilson
by
5.8k points

1 Answer

2 votes
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
User Jtimperley
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5.9k points
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