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Ratios 3, 4, 0 and the x-axis: cosine of the angle is:
A4/5
B3/5
C3/4
D1/5
Answer & Solution
Correct answer: B. 3/5
The x-axis has ratios 1, 0, 0, so cos θ = 3/5 as the length of 3, 4, 0 is 5.
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