The acute angle between two lines whose direction qosines are given by the relation between l + m + n = 0 and l^2

### Question Asked by a Student from EXXAMM.com Team

Q 2186701677.     The acute angle between two lines whose direction qosines
are given by the relation between l + m + n = 0 and

l^2 + m^2- n^2 = 0 is
A

pi/2

B

pi/3

C

pi/4`

D

None of these

#### HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

#### Access free resources including

• 100% free video lectures with detailed notes and examples
• Previous Year Papers
• Mock Tests
• Practices question categorized in topics and 4 levels with detailed solutions
• Syllabus & Pattern Analysis