Page 61 - E booklet prep 3 bader 2025 b_Neat

6) Prove that the straight line passing through the two points ( ?? , ??v?? ) ,

(?? , ??v??)
is perpendicular to the straight line that makes an angle of measure ?????? with

positive direction to x – axis

M1 = ??v??-??v?? = -v??
??-??

M2 = tan 30 = ?? since M1 x M2 = -1
v??

Then They are perpendiclar

7) If the triangle with vertices X( ?? , ?? ) , ??(?? , ??) , ??( -?? , ?? ) is right angled at y

then find the value of a

M1 = ??-?? = -??
??-??

M2 = ??-?? = ??-??

-??-?? -??

??-?? = ??
-?? ??

a= ??
??

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