Question:
If A2 + B2 +C2 = 0, then what is the value of the following? 1 1 1 cosc os cosc os cosc os CB CA BA
If A2 + B2 +C2 = 0, then what is the value of the following? 1 1 1 cosc os cosc os cosc os CB CA BA
Options:
- a) -1
- b) 0
- c) 1
- d) 2
- a) -1
- b) 0
- c) 1
- d) 2
correct answer : b)
Explanation:
\ A2 + B2 + C2 = 0
\ A = B = C = 0
Now,
1
1
1
cosc os
cosc os
cosc os
CB
CA
BA
=
111
111
111
= 0
\ A2 + B2 + C2 = 0
\ A = B = C = 0
Now,
1
1
1
cosc os
cosc os
cosc os
CB
CA
BA
=
111
111
111
= 0