Two vectors 
and 
have equal magnitudes. The magnitude of (
+
) is ‘n’ times the magenitude of (
). The angle between 
and 
is:
(a)
sin−1 
(b)
cos−1
(c)
cos−1
(d)
sin−1
Two vectors and have equal magnitudes. The magnitude of (+) is ‘n’ times the magenitude of (). The angle between and is:
(a)
sin−1
(b)
cos−1
(c)
cos−1
(d)
sin−1
Question ID - 50262 | SaraNextGen Top Answer
Two vectors and have equal magnitudes. The magnitude of (+) is ‘n’ times the magenitude of (). The angle between and is:
(a)
sin−1
(b)
cos−1
(c)
cos−1
(d)
sin−1
|
Two vectors |
|||
|
(a) |
sin−1 |
(b) |
cos−1 |
|
(c) |
cos−1 |
(d) |
sin−1 |
1 Answer
127 votes
Answer Key / Explanation : (c) -
|
+
/2 … (1)
|
+
| =2a cos 
=2a 
/2 … (2)
⇒ n
=2a 
⇒ tan
=n
127 votes
Answer Link
127