The word Trigonometry can be split as Tri - gono - metry, meaning the measure of the three angles of a triangle. The study of trigonometry is very much useful in finding the distance between the stars and planets, height of a building, distance of a ship from the shore, height of a plane at an instant etc. To solve the problems on this we should know the basics of trigonometry. To study about the basics of trigonometry, let us study about the right angled triangle and the trigonometric ratios of each of the acute angles.
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