Aerospace Engineering > GATE 2019 > Vectors
Vector b⃗ is obtained by rotating a⃗ = î + ĵ by 90° about k̂, where î, ĵ, and k̂ are unit vectors along the x, y, and z axes, respectively. b⃗ is given by _______.
A
î - ĵ
B
-î + ĵ
C
î + ĵ
D
-î - ĵ

Correct : b

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