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Trigonometry Right Angled Triangle. Hypotenuse [H]

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©G Dear2008 – Not to be sold/Free to use General Mathematic (HSC) Further Trigonometry Introduction Stage 6 - Year 12 Press Ctrl-A ©G Dear2008 – Not to be sold/Free to use

3.1 Calculating Trig Ratios (1/11) You can use your calculator to find trigonometric ratios. When finding the angle we need to show working Example: Sin θ = 0.649 θ = Sin-1(0.649) Use DMS or o ’ ’’ = 40.4662o Minutes = 40o 27’ 58’’ Seconds Degrees

3.1 The Trigonometric Ratios (2/11) α Adjacent Opposite Hypotenuse

3.1 The Trigonometric Ratios (3/11) β Adjacent Opposite Hypotenuse

3.1 The Trigonometric Ratios (4/11) ld Sin θ = H ags h o C an a h Cos θ = A lways θ a H ide o a T heir Tan θ = ld A ge