If A+B+C=180 then prove that
Cos3Acos3B+cos3Bcos3C+cos3Ccos3A=1

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )

its line 2 i just added the rest or else it wouldn't let me answer

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