The other type of question in chapter 7 is solving trigonometric equation. We will not be practicing this type of question here because there are lots of practice problems from the homework questions. Make sure you understand how to solve for the solutions (solution in one period and all solutions) Instead of solving trigonometric equation, we would like to practice on how to rewrite an angle as sum/difference of two special angles or rewrite an angle as half of a special angle. Before that, let me list all the special angles in (0, 2n): QI - 30", - 45°, - 60 120 3 3 135. 4 QI 150 6. 4 225 4 240 3 11 QII 210. 7m QIV = 300 315 4 = 330 6 on the coordinate axis 3m = 270 90, *= 180, Now rewrite the following angles as sum or difference of two special angles: 4) 15° 5) 165 6) 255o

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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The other type of question in chapter 7 is solving trigonometric equation. We will not be practicing this type of question here because there are lots of practice problems from the homework questions. Make sure you understand how to solve for the solutions (solution in one period and all solutions)
Instead of solving trigonometric equation, we would like to practice on how to rewrite an angle as sum/difference of two special angles or rewrite an angle as half of a special angle. Before that, let me list all the special angles in (0, 27|:
QI
= 30°.
6
= 45"
= 60
27
:- = 120°,
3
= 135°,
4
= 150
6
QII
57
= 225°,
4
240
3
QIII
210°,
6
= 315°,
4
117
= 330°
6
QIV
= 300°,
3
37
= 270°
2
on the coordinate axis
= 90°,
T = 180°,
Now rewrite the following angles as sum or difference of two special angles:
4) 15
5) 165°
6) 255°
Transcribed Image Text:The other type of question in chapter 7 is solving trigonometric equation. We will not be practicing this type of question here because there are lots of practice problems from the homework questions. Make sure you understand how to solve for the solutions (solution in one period and all solutions) Instead of solving trigonometric equation, we would like to practice on how to rewrite an angle as sum/difference of two special angles or rewrite an angle as half of a special angle. Before that, let me list all the special angles in (0, 27|: QI = 30°. 6 = 45" = 60 27 :- = 120°, 3 = 135°, 4 = 150 6 QII 57 = 225°, 4 240 3 QIII 210°, 6 = 315°, 4 117 = 330° 6 QIV = 300°, 3 37 = 270° 2 on the coordinate axis = 90°, T = 180°, Now rewrite the following angles as sum or difference of two special angles: 4) 15 5) 165° 6) 255°
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