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Two lines have slopes 1/2 and 1/3. The tangent of the acute angle between them is
A1/5
B1/7
C1/6
D5/7
Answer & Solution
Correct answer: B. 1/7
tan θ = (1/2 – 1/3)/(1 + 1/6) = (1/6)/(7/6) = 1/7.
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