The student will be able to evaluate the sine, cosine, tangent, secant, cosecant and cotangent of any angle whose reference angle is 0°, 30°, 45°, 60° or 90°.

- In the applet to the left, drag the red button to set the angle to 30°.
- What is the radius of the circle that is shown? This radius is also the hypotenuse of the right triangle!
- Look at the measure of the legs of the triangle, the trig ratios are shown for these measures. Do you recognize any of these numbers?
- Drag the red button to set the angle to 45° and 60°. Check the measures and trig ratios for these angles too.

No hands-on yet

**The Math Page:** Online notes on 30-60-90 triangles and their corresponding trig values. The Math Page**Interactive Math:** Online notes on 30-60-90 & 45-45-90 triangles and their corresponding trig values. Interactive Math**Interactive Math 2:** Online notes on the signs of the trig functions in each quadrant. Interactive Math 2

Click the buttons to open the following puzzles. The puzzles will likely open in a window *behind* this one.

- SINE Puzzle (Click Button)
- COSINE Puzzle (Click Button)
- TANGENT Puzzle (Click Button)
- MIXED Puzzle (Click Button)