On the unit cirlce, the cosine of an angle is negative whenever the angle falls in the interval
If you recall your special triangles, this cosine occurs for angles of
More generally, this occurs for
What is the slope of the line that passes through the points 4,5 and 12,7
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On the unit cirlce, the cosine of an angle is negative whenever the angle falls in the interval
If you recall your special triangles, this cosine occurs for angles of
More generally, this occurs for