Let PN be the perpendicular from the point `P(1, 2, 3)` to xy-plane. If OP makes an angle `alpha
Channel: Doubtnut
Date: 2020-03-29

Let PN be the perpendicular from the point `P(1, 2, 3)` to xy-plane. If OP makes an angle `alpha` with positive direction of the z-axis and ON makes an angle `beta` with the positive direction of x-axis, where O is the origin (`alpha and beta ` are acute angles), then