Trigonometry+AS+1.7

Place notes here: **SOH,CAH,TOA.**
 * See these notes for diagrams too: [[file:Trig notes (finding sides).docx]]**

**TRIGONOMETRY** We will be using trigonometry to find unknown sides and unknown angles in Right Angled Triangles. The first concept we need to understand is how to name each side of the triangle: We name them with the sides: Hypotenuse (longest side), Opposite (opposite the angle that has been given), Adjacent (attached to the angle or the left over side).

1. Label each of the sides of the triangle (opp, hyp & adj) 2. Cross out the side that is blank (has no number or letter) 3. Now check what letters you have left and use SOH CAH TOA to determine whether you use sin, cos or tan. 4. Once you know whether you are using sin cos or tan write down the full formula: Eg, sinƠ = __O__ H Then replace the Ơ, O & H with the appropriate numbers and letter. If the unknown is on the top you multiply sinƠ with H If the unknown is on the bottom you divide O with sinƠ
 * Steps to find an unknown side using Trig:**


 * Practice Test:**