engineering recuitment NPCIL Plant Operator Mock Test Mathematics Lines Properties of Lines

The acute angle between two lines y = x + 4 and y =  2x - 3 is

1
\(\rm \tan^{-1} \left(\frac 1 4 \right)\)
2
\(\rm \tan^{-1} \left(\frac 1 3 \right)\)
3
\(\rm \tan^{-1} \left(\frac 2 3 \right)\)
4
None of the above
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