The Pythagorean identity revisited Student activity Play

The same shapes of the graphs Whiteboard exercise Play

The same values of the sine and the cosine Whiteboard exercise Play

The signs of the trigonometric functions Student activity Play

The signs of trigonometric functions Whiteboard exercise Play

The signs of trigonometric functions – clockwise turn Whiteboard exercise Play

The sine and the cosine functions having the same graphs Whiteboard exercise Play

The tangent and coordinates of the points Animation Play

The tangent as a coordinate Animation Play

The tangent of an arbitrary angle Student activity Play

The tangent – reducing angles Student activity Play

The values of the derivative of the cosine function Whiteboard exercise Play

The values of the trigonometric functions Animation Play

Transforming cosine-like functions Whiteboard exercise Play

Transforming sine- and cosine-like functions Student activity Play

Trigonometric equations (1) Class activity Play

Trigonometric equations (1) Whiteboard presentation Play

Trigonometric equations (2) Whiteboard presentation Play

Trigonometric equations (2) Class activity Play

Trigonometric functions Student activity Play

Trigonometric functions Animation Play

Trigonometric functions Student activity Play

Trigonometric functions and their signs Animation Play

Trigonometric functions of the angle 120° Animation Play

Trigonometric functions of the angle 45° Whiteboard exercise Play