https://openlab.citytech.cuny.edu/groups-mat-1275co-course-hub-/lessons/lesson-26-solving-right-triangles-applications-of-static-trigonometry/

Openstax Section:

7.2 Right Triangle Trigonometry

WeBWorK Set:

SolvingRightTriangles

SpecialTriangles

TrigonometricRatios