सदिश \(\rm 60 \hat{i}+3 \hat{j}, 40 \hat{i}-8 \hat{j}\) और \(\rm \beta \hat{i}-52 \hat{j}\) संरेख हैं यदि :

1
β = 20
2
β = 40
3
β = -40
4
β = 26

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