|=0 Where a1, b1, c1 are direction cosine of 1‌st ‌ line and a2, b2, c2 are direction cosine of 2‌nd ‌ line. Now. Solving options Point (−3,1,5)& point (−1,2,5) ‌(1)|
−3
1
5
1
2
5
−2
−1
0
| ‌=−3(5)−(10)+5(−1+4) ‌=−15−10+15=−10 (2) point (−1,2,5) ‌|
−3
1
5
−1
2
5
−2
−1
0
| ‌=3(5)−(10)+5(1+4) ‌−25+5=0 (3) point (−1,2,5) ‌|
−3
1
5
−1
2
4
−2
−1
0
| ‌−3(4)−(8)+5(1+4) ‌−12−8+25=5 (4) point (−1,2,5) ‌|