The Total solution for NCERT class 6-12
Answer - 11 : -
Answer - 12 : -
Answer - 13 : -
Answer - 14 : -
Answer - 15 : -
4.
Findthe angle between the lines whose direction cosines are given by equations
2l + 2m- n = 0, mn + ln + lm= 0
Answer - 16 : - 1.