EQUATION OF LINE AT AN GIVEN ANGLE WITH GIVEN LINE- free study material – COORDINATE GEOMETRY FOR IIT – JEE ADVANCED / JEE MAINS

In this post a1maths.com explains

How we get the equation of possible lines making given angle with the given line

equation of line inclines with 2 line
we are solving for positive sign , by the same we solve for negative sign 
equation of lline inclined with 2 line
Mean satisfying given conditions two lines are possible

Its very important for detail take help from video lectures

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