1.

If θ is the angle between Two lines whose slopes are m1 & m2, then Tan θ = ________

A. m1 - m2
B. m1 + m2
C. (m1 - m2) / (1 + m1 m2)
D. (m1 - m2) / (1 - m1 m2)
Answer» D. (m1 - m2) / (1 - m1 m2)


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