Undefined gradient Animation Play

Unknown angle in a triangle Animation Play

Using tangent theorems Student activity Play

Using tangent theorems Whiteboard exercise Play

Using the calculator Student activity Play

Using the calculator Whiteboard exercise Play

Using the difference identity for the tangent Whiteboard exercise Play

Using the double-angle formulas for the tangent to rewrite cosine Whiteboard exercise Play

Using the double-angle formulas for the tangent to rewrite sine and cosine Student activity Play

Using the second derivative Whiteboard exercise Play

Using the second derivative Student activity Play

Using the tangent Student activity Play

Using the tangent Animation Play

Using the tangent to find the zero of a function Whiteboard exercise Play

Values of the tangent Animation Play

What is the radius? Whiteboard exercise Play

What is the radius? Student activity Play