Unit Circle - Trignometry - Lecture Notes, Study notes of Trigonometry

This lecture handout is from basic course of Trigonometry. Even it has basic information of maths still its worth subject if you want to learn maths. This lecture teaches us things like: Unit Circle, Introduction to Trignometry, Graphical Representation, Small, Medium, Large

Typology: Study notes

2012/2013

Uploaded on 02/01/2013

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Advanced Algebra Section Trig1A.7B LT: Use the unit circle to find trig ratios for right angles (and others) « Remember that cos0 = xandsind = y e Unit circle... o Radiusis 1 o Remember 3 values... = Small: = (30-60-90) = Medium: < (45-45-90) = Large: “= (30-60-90) ¢ DON’T MEMORIZE POINTS! (Think of it more like a clock.) Examples Give the exact trigonometric function value in each of the following. NO CALCULATORS / NO DECIMALS! 1. sin 0° 2. sin 90° ueldous " e ( 1 \ _ SK oat 3. cot 180° 4. sec270° | cos ss —| 0 49 ; Si ° | “1 ndeSinad nde: oad 5. cos90° Yat 6. sin 60° lone, or - oO q | ( 7. tan 210° 8. t45° —— ~~ co ass _ 2 cos \ x cos rey — Tf t ae aioe 2 wig = AS, 4% [S @ 1/2