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A function f: x èy is said to be a Surjective function or an Onto function if for every y E Y, there exists at least one x E X such that y = f(x). In an onto function, […]

HEIGHTS AND DISTANCES
In this chapter we learn how to use the trigonometric ratios to calculate heights of objects and distances between objects by measuring angles rather than sides.
ANGLE OF ELEVATION
Angle of elevation of a point P as observed from a point O (Refer figure) is the Angle POR where R is the foot of the […]