Khan Academy (English - US curriculum)
Math by grade
Eureka Math/EngageNY
Algebra 2 (Eureka Math/EngageNY)
Module 2: Trigonometric functions
Topic B: Lesson 14: Graphing the tangent function
Topic B: Lesson 14: Graphing the tangent function
Graph of y=tan(x)
Tangent identities: symmetry
Tangent identities: periodicity
