Question

what is the formula for the angle between two straight line​

Answer 1

If one of the line is parallel to y-axis then the angle between two straight lines is given by tan θ = ±1/m where 'm' is the slope of the other straight line. If the two lines are a1x + b1y + c1 = 0 and a2x + b2y + c2 = 0, then the formula becomes tan θ = |(a1b2 - b1a2)/(a1a2 + b1b2)|

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Answer 2

Answer:

Hey there this is your answer...!!!

If one of the line is parallel to y-axis then the angle between two straight lines is given by tan θ = ±1/m where 'm' is the slope of the other straight line. If the two lines are a1x + b1y + c1 = 0 and a2x + b2y + c2 = 0, then the formula becomes tan θ = |(a1b2 - b1a2)/(a1a2 + b1b2)|

Step-by-step explanation:

hope this helps you...!!