[size=150][b][size=200]We have three trigonometric functions: sine, cosine and tangent.[br][br]These are commonly abbreviated to 'sin' 'cos' and 'tan'.[br][br]Trigonometric functions work with angles.[/size][/b][/size]
[b]Move the right angle and change the value of [/b][math]\alpha[/math][b]. Look at what happens with the calculations[/b]
How do the trig functions relate to the ratio of sides?
Is cos ([math]\alpha[/math]) =
Is tan ([math]\alpha[/math]) =
Is sin ([math]\alpha[/math]) =
[b][size=150]SOHCAHTOA is used in Trigonometry to help us remember the functions. What does it mean? [br]Hint: how does it relate to the above ratios?[/size][/b]
[size=200][b]Make a note of SOHCAHTOA so you can remember how to use it on the next activity.[/b][/size]