# Up to 90°

On this first applet, control the angle to see how the red, green and blue lines get longer or shorter.

- At what angle do the green and red line segments have equal length?
- Given that the angle permitted ranges from zero to 90°, whats the shortest/longest green line segment?
- What’s the shortest/longest red line segment?
- What’s the shortest/longest blue line segment?

# Matching to 90°

Move the trig values to their corresponding decimal value, without using a calculator or a trig table.

- use the applet above with values
- use the applet above without values
- visualize the applet above

# 0 to 360 degrees

Sine, cosine and tangent are defined for any angle – from negative infinity to positive infinity. Here we see the value of sine, cosine and tangent for angles between 0° and 360°.

# Matching, 0 – 360

Once again, by considering the visual above, match the labels with their values: