Trigonometric Ratios of Acute Angles

Below shows ∠BAC.

You can shift the points B and C to change the size of ∠BAC.


Instructions:

1. Adjust the size of ∠BAC.
2. Check the boxes.
3. Observe the ratios of the lengths of the sides of the right-angled △ABC.
4. Observe the values of the trigonometric functions: \(\sin \theta \), \(\cos \theta \) and \(\tan \theta \).
5. Repeat steps 1 ~ 4 for other sizes of ∠BAC.

Download the GeoGebra file: http://www.geogebratube.org/material/download/format/file/id/44996

Download the GeoGebra Worksheet: http://db.tt/qkrYqnYQ

Download the Worksheet: http://db.tt/ZWW78kyk