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bar(A)=0.5hat(i)+0.4hat(j)+chat(K) Th...

`bar(A)=0.5hat(i)+0.4hat(j)+chat(K)`
The value of c for which `bar(A)` is unit vector is :

A

0.1

B

0.59

C

`sqrt(0.7)`

D

`-sqrt(0.59)`

Text Solution

Verified by Experts

The correct Answer is:
D
`0.5^(2)+0.4^(2)+c^(2)=1^(2)`
`c=pmsqrt(0.59)`
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