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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 Fall '12
 Rose,Susan
 Trigonometry, Angles

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