# Trigonometric Equations

This cheat sheet covers the high school math concept – Trigonometric Equations.

This concept is one of the important ones under Trigonometry. It generally follows after trigonometric ratios and identities.

A good knowledge of the trigonometric ratios and basic identities is a must to understand and solve problems related to trigonometric equations. A cheat sheet on Trigonometry is also available on this website.

A decent understanding of graphs and their transformations will really help in quickly solving trigonometric equations. A cheat sheet on Graph Transformations is also available on this website.

This one page PDF covers summarised theory and the most important formulas related to the concept. Keep it handy while you’re revising the concept, especially before an exam.

The topics included in this cheat sheet are:

• Basic Trigonometric Equations: sinx = sinα, cosx = cosα, tanx = tanα, sin2x = sin2α, cos2x = cos2α, tan2x = tan2α
• Special Cases: sinx = 0, sinx = 1, sinx = -1, cosx = 0, cosx = 1, cosx = -1, tanx = 0, cotx = 0