If a vector $\overrightarrow P $ making angles $\alpha, \beta\ and\ \gamma$ respectively with the $X, Y$ and $Z$ axes respectively. Then ${\sin ^2}\alpha + {\sin ^2}\beta + {\sin ^2}\gamma = $
If a vector $\overrightarrow P $ making angles $\alpha, \beta\ and\ \gamma$ respectively with the $X, Y$ and $Z$ axes respectively. Then ${\sin ^2}\alpha + {\sin ^2}\beta + {\sin ^2}\gamma = $
- A
$0$
- B
$1$
- C
$2$
- D
$3$
Similar Questions
Any vector in an arbitrary direction can always be replaced by two (or three)
Any vector in an arbitrary direction can always be replaced by two (or three)
The angle between vectors $\vec a$ and $\vec b$ is $\frac{\pi }{6}$. The angle between vectors $ - 3\vec a$ and $ 2\vec b$ is
The angle between vectors $\vec a$ and $\vec b$ is $\frac{\pi }{6}$. The angle between vectors $ - 3\vec a$ and $ 2\vec b$ is
Explain position and displacement vectors. How the magnitude of vector quantity is represented ?
Explain position and displacement vectors. How the magnitude of vector quantity is represented ?
Explain null vector. Explain the physical significance of null vector.
Explain null vector. Explain the physical significance of null vector.
Position of a particle in a rectangular-co-ordinate system is $(3, 2, 5)$. Then its position vector will be
Position of a particle in a rectangular-co-ordinate system is $(3, 2, 5)$. Then its position vector will be