1.

If a half line bar(OP)where bar(OP)=rmakes an angle alphawith the positive X-axis bar(OX)and lies in the XZ plane, then the coordinates of P are:

Answer»

`(0, 4 cos alpha, 0)`
`(R cos alpha, 0, RSIN alpha)`
`(r SIN alpha, 0, rcos alpha)`
`(0, r sin alpha, 0)`

Answer :B


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