Engineering Board Exam Reviewer · Angle Between Two Lines · medium
What is the acute angle between the lines y=3x+2 and y=4x+9?
- 4.4°
- 28.3°
- 5.2°
- 18.6°
Answer
A. 4.4°
Solution
y=3x+2 has slope 3; y=4x+9 has slope 4. angle = ≤ft[4-3/1+12 ] = ≤ft(1/13 ) = 4.4°.
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