Q.

The angle between the lines x−12=y−21=z+32  and x1=y1=z0 is

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a

00

b

300

c

450

d

900

answer is C.

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Detailed Solution

Use formula, cosθ=|a1a2+b1b2+c1c2|a 12+b 12+c 12a 22+b 22+c 22
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The angle between the lines x−12=y−21=z+32  and x1=y1=z0 is