If a line {\OP} of length r (where ' {\O} ' is the origin) makes an angle \alpha with x-axis and lies in the x z-plane, then what are the coordinates of {\P} ?

Correct Answer is : (rcosα,0,rsinα)

(r \cos \alpha, 0, r \sin \alpha)

UPSC NDA 2 2012 Mathematics Paper

Question : 54 of 120

Marks: +1, -0

If a line OP of length r (where ' O ' is the origin) makes an angle α with x-axis and lies in the xz-plane, then what are the coordinates of P ?

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