Two equal parabolas have the same vertex and their axes are at right angles. Then the angle between the tangents to them at their point of intersection (other than vertex) is- (a)π/4 (b)tan−1 (2) (c)tan−1(3/4) (d)π/3

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Maximization

Have you ever seen a bridge in the shape of a parabola? Where is its maximum on the bridge? The maximum of that bridge is the highest point on that bridge. The process of finding the maximum of the bridge here is called the maximization.