# Trigonometric Functions G11

Today, trigonometry finds an application in seismology, designing electric circuits, describing the state of an atom, predicting the heights of tides in the ocean, analysing a musical tone, and in many other areas. In earlier classes, we have studied the basics of trigonometry, that is ratios of acute angles as the ratio of the sides of a right-angled triangle. In this chapter, we will be learning trigonometric functions, their domain, and range, their behaviour in 4 quadrants, identities of trigonometric functions, and solutions to trigonometric equations. With this, we will cover all there is to know about trigonometry and apply it to other fields of academics as well.

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