∑
Math Lab
Classes
Class X
Class XII
Formulas
Quizzes
▶
Play
☰
Home
/
Class XII
/
Chapter 11
/
Direction cosines, direction ratios, and lines
/
Quiz
Class XII
Quick check : Direction cosines and ratios
6 questions
Question 1 of 6
Score:
0
/ 0
Direction cosines satisfy
A
l
+
m
+
n
=
1
l + m + n = 1
l
+
m
+
n
=
1
B
l
2
+
m
2
+
n
2
=
1
l^2 + m^2 + n^2 = 1
l
2
+
m
2
+
n
2
=
1
C
l
m
n
=
1
lmn = 1
l
mn
=
1
D
Nothing universal
← Back to subtopic notes
AI Summary
Summarize this page in your favorite LLM