Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Lines Properties of Lines
If the equation of a line having a slope m(m ∈ \(\mathbb Z\)), passing through (1,1) and making an angle of tan-1\(\left( {\frac{5}{7}} \right)\) with the line x + y - 3 = 0 is ax + y + c = 0, then ac =
1
-7
2
-42
3
-21
4
More than one of the above
5
None of the above