Gujarati
3-1.Vectors
easy

$0.4\hat i + 0.8\hat j + c\hat k$ एक इकाई सदिश को प्रदर्शित करता है जब $c$ का मान है

A

$-0.2$

B

$\sqrt {0.2} $

C

$\sqrt {0.8} $

D

$0$

Solution

(b) $\sqrt {{{(0.4)}^2} + {{(0.8)}^2} + {c^2}} = 1$

==> $0.16 + 0.64 + {c^2} = 1$==> $c = \sqrt {0.2} $

Standard 11
Physics

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