Trigonometric Functions
Students measure the height of a fixed point on a hula hoop as it makes a complete revolution. Rather than using Sine = Opposite/Hypotenuse, we talk about sine being the vertical height in a unit circle.
This is a resource I got from an EMATHS Algebra 2 conference. 
Boat on a River

Cute little 3 Act math opener to solving equations with basic trig functions (Sine, Cosine, Tangent). Link to videos here.

Exploring Trig Functions

Intro to Secant, Cosecant, and Cotangent by EMATHS

Law of Sines and Cosines
Radian Cut Ups


Trig War



I LOVE this problem. Problem #3 is excellent because students have to take into account the overlap on the track. This involves needing to find the area of a sector of a circle and then subtracting the area of a triangle. Taken from EMATHS Algebra 2 (I used it in Geometry)

Cosine Ferris Wheel

Taken from Math Assessment Project

Trig Transformations

Geogebra Files WITH Sliders

Geogebra Files WITHOUT Sliders
