Lesson 4.5--Trig Ratios--Page 4
You can't use this applet on your calculator, but your calculator does have sine, cosine, and tangent buttons.
Click the "Show Trig Ratios" button and experiment by dragging point A to form different triangles. What do you think the sine of angle represents?
What do you think cosine of represents?
What do you think tangent of represents? (This one is a little tougher; remember that they're called trigonometric ratios.