If , , be the angles which a line makes with the co-ordinate axes… - Vidyadip

MCQ

If $\alpha, \beta, \gamma$ be the angles which a line makes with the co-ordinate axes, then

A
$\sin ^2 \alpha+\cos ^2 \beta+\sin ^2 \gamma=1$
✓
$\cos ^2 \alpha+\cos ^2 \beta+\cos ^2 \gamma=1$
C
$\sin ^2 \alpha+\sin ^2 \beta+\sin ^2 \gamma=1$
D
$\cos ^2 \alpha+\cos ^2 \beta+\sin ^2 \gamma=1$

✓

Answer

Correct option: B.

$\cos ^2 \alpha+\cos ^2 \beta+\cos ^2 \gamma=1$

B

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