Maths-
General
Easy
Question
The angle between the lines x
and x cos 
where 
is
The correct answer is:
We should find the angle between two straight lines
xcosα+ysinα=p1
slope=m1=sinα−cosα=−cotα
And xcosβ+ysinβ=p2
slope=m2=sinβ−cosβ=−cotβ
Therefore,
tanθ=∣tan(α−β)∣
⇒θ=α−β
Hence θ=α−β
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