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1.8 Trig Functions of Special Angles

1.8 Trig Functions of Special Angles - θ and the...

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Agenda: 1. Homework Roll 2. Whiteboard Warmup 3. Lesson: 1.8 Trig Functions of Special Angles ____________________________________ Homework Roll Roll HW# 1,2 7 3,4 8 5 9 6 10 ____________________________________ Whiteboard Warmup State the values of all 6 trig functions of an angle whose terminal side goes through the point . ____________________________________ Lesson: 1.8 Trig Functions of Special Angles Goal: Find reference angle measures Angles whose terminal side is on the x or y axis Triangles that are either or What do I mean by special angles? Def'n of Reference Angle Let θ be an angle in standard position. Its reference angle is the acute angle θ

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Unformatted text preview: θ and the horizontal axis. 1.8 Trig Functions of Special Angles Tuesday, September 06, 2011 7:52 AM Ch_1 Page 1 (Reference angles will help us to find the values of special trig functions!) Sometimes we will have to find the coterminal angle to get between ±² and ³´±² , or between ± and µ¶ Special Triangle Side Ratios ·¸² ¹ ·¸² ¹ º±² ³±² ¹ ´±² ¹ º±² _______________________________ Examples Draw the triangle! Find »¼½¾³±²¿ Find ½ÀÁ¾ Â Ã ¿ Ch_1 Page 2 _______________________________ Find ± for the given angle . First, determine the quadrant the angle is in! Sometimes we will need to find the coterminal angle also. .. ²³´µ ¶·²´µ ¸ ¹ º ²² » º Ch_1 Page 3...
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1.8 Trig Functions of Special Angles - θ and the...

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