Visual Trig Values

Up to 90°

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

GeoGebra applet link

  1. At what angle do the green and red line segments have equal length?
  2. Given that the angle permitted ranges from zero to 90°, whats the shortest/longest green line segment?
  3. What’s the shortest/longest red line segment?
  4. 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.

  1. use the applet above with values
  2. use the applet above without values
  3. visualize the applet above

Geogebra applet link

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°.

GeoGebra applet link

Matching, 0 – 360

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

GeoGebra applet link


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