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In a two-dimensional motion of a particl...

In a two-dimensional motion of a particle, the particle moves from point A of position vector `vecr _(1),` to point B of vectors are , respectively, `r _(1) =3 and r _(2) =4` and the angles they make with the x axis are `theta _(1) = 75^(@)and theta_(2) = 15 ^(@),` respectively, then find the magnitude of the displacement vector.

A

15

B

`sqrt13`

C

`17`

D

`sqrt15`

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The correct Answer is:
B
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