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Most Important Selected Qs for JEE AdvancedMathematicsStraight Lines

If the straight lines a x+b y+c=0 and x +y =c , enclose an angle / 4 between them and meet the straight line x -y =0 in the same point then write the value of a^2+b^2

Correct answer

2

Step-by-step solution

aligned & 3 lines are concurrent & | array ccc a & b & c & & -c & - & 0 array |=0 & a + b =-1 & ( / 4)= |a +b | a^2+b^2 ^2 + ^2 & a^2+b^2=2 aligned

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