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Keep it handy while you’re revising the concept, especially before an exam.

This one page PDF covers summarised theory and the most important formulas related to the concept. A cheat sheet on Graph Transformations is also available on this website. A cheat sheet on Trigonometry is also available on this website.Ī decent understanding of graphs and their transformations will really help in quickly solving trigonometric equations. In contrast, we can also find particular solutions to a trigonometric equation, which satifsy some other condition, say all solutions lying in the interval (-2π, 2π).Ī good knowledge of the trigonometric ratios and basic identities is a must to understand and solve problems related to trigonometric equations. Half angle formulas sin(1 2 x) 2 1 2 (1 cosx) cos(1 2 x) 2. The set of all such solutions is called the general solution of the equation. USEFUL TRIGONOMETRIC IDENTITIES De nitions tanx sinx cosx secx 1 cosx cosecx 1 sinx cotx 1 tanx. In general, trigonometric equations end up having infinite solutions, due to the periodicity of the trigonometric functions. The values of the unknown angles that satify the equation are called the solutions to the equation. Basic Trigonometric Function Formulas sin Opposite Side/Hypotenuse cos Adjacent Side/Hypotenuse tan Opposite Side/Adjacent Side sec. This cheat sheet covers the high school math concept – Trigonometric Equations.Īn equation, that involves trigonometric ratios of unknown angles, is known as a trigonometric equation.