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3-1.Vectors
easy
Which of the following is a unit vector?
A$\hat{ i }+\hat{ j }$
B$\cos \theta \hat{ i }-\sin \theta \hat{ j }$
C$\sin \theta \hat{ i }+2 \cos \theta \hat{ j }$
D$\frac{1}{\sqrt{3}}(\hat{ i }+\hat{ j })$
Solution
(b)
Magnitude of which is $1$.
Magnitude of which is $1$.
Standard 11
Physics
