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Chapter 12 Trigonometry Triangle

# Also it is always the acute angle that is formed from

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Unformatted text preview: , 6, 10, 12 CW/HW: p559 #1,3,5,7,9- 13 Day 2: CW: p559 Oral 1,3,5- 8,11 HW: p559- 560 wricen 16- 19, 21- 29 odd Reference Angle The acute angle is formed by the terminal side of the given angle and the x- axis. Reference angles may appear in all four quadrants. •  In the First Quadrant (0° to 90°). •  The easiest of the four, the reference angle is equal to the angle measure. •  In the Second Quadrant (90° to 180°) •  To ﬁnd the reference angle in the second quadrant, subtract the angle from 180°. •  In the Third Quadrant (180° to 270°). •  To ﬁnd the reference angle of an angle like the one pictured, subtract 180° from the angle that is given. •  Lastly, in the Fourth Quadrant which is 270° to 360°, you subtract the angle from 360°. •  This will provide...
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