Question

plz derive formula for angle between two lines m1 and m2​

Answer 1

Answer:

m

1

=tanθ

1

,m

2

=tanθ

2

Also, θ=θ

2

−θ

1

⇒tanθ=tan(θ

2

−θ

1

)

=

∣

∣

∣

∣

∣

1−tanθ

1

tanθ

2

tanθ

2

−tanθ

1

∣

∣

∣

∣

∣

- by formula

tanθ=

∣

∣

∣

∣

∣

1−m

1

m

2

m

1

−m

2

∣

∣

∣

∣

∣

---- (2)