1
CBSE 12th Mathematics Delhi Set 1 - 2023
MCQ (Single Correct Answer)
+1
-0

If a line makes angles of $$90^{\circ}, 135^{\circ}$$ and $$45^{\circ}$$ with the $$x, y$$ and $$z$$ axes respectively, then its direction cosines are:

A
$$0,-\frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}$$
B
$$-\frac{1}{\sqrt{2}}, 0, \frac{1}{\sqrt{2}}$$
C
$$\frac{1}{\sqrt{2}}, 0,-\frac{1}{\sqrt{2}}$$
D
$$0, \frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}$$
2
CBSE 12th Mathematics Delhi Set 1 - 2023
MCQ (Single Correct Answer)
+1
-0

The angle between the lines $$2 x=3 y=-z$$ and $$6 x=-y=-4 z$$ is:

A
$$0^{\circ}$$
B
$$30^{\circ}$$
C
$$45^{\circ}$$
D
$$90^{\circ}$$
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