Question

The vector OA where O is the origin is given by OA=2Î+2j .Now it is rotated by 45 degree anticlockwise about O .What will be the new vector?

Answer 1

let OA=a
x component is i^
cosθ=a.b/|a||b|
cosθ=2/2√2
cosθ=1/√2
θ=45°
angle rotated through 45° anti clockwise
then new angle will be 45+45=90°
x component will be zero
y component will be 2√2j^
the new vector is 2√2j^

Answer 2

Answer:

2 root j^ is answer of this question....