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by: B. C

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# Trigonometry 1323

B. C
MSU

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Notes for the first week of Trigonometry Section 1.1
COURSE
Trigonometry
PROF.
Julie nation
TYPE
Class Notes
PAGES
8
WORDS
CONCEPTS
Trigonometry
KARMA
Free

## Popular in Math

This 8 page Class Notes was uploaded by B. C on Wednesday August 24, 2016. The Class Notes belongs to 1323 at Mississippi State University taught by Julie nation in Fall 2016. Since its upload, it has received 97 views. For similar materials see Trigonometry in Math at Mississippi State University.

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Date Created: 08/24/16
Section 1.1      Angles are commonly measured in degrees  A complete rotation = 360​°   1​° = 1/360  90° = 90/360 or ¼  of a rotation   Therefore 90°  in each quadrant   180°  = ½ of  a rotation          Angles that are greater than 90° (x° > 90°) ​are obtuse  Angles that are less than  90°  (x° < 90°) ​are acute  Angles sitting exactly at 90°  are ​right angles.         Finding Complement or Supplement angles.     Comp subtracts angle x​°​ from 90° ​    Sup subtracts angle x° from 180°  So if you were asked to find the Comp and Sup of 20° you would do this:    Comp: 90° ­ 20° = 70°   Sup:  180°  ­ 20° = 160°       Now for a different styled problem: 24° 20​ '        DMS = Degrees Minutes Seconds  1​° = 60 minutes (60 '​)   1​' ​= 60 seconds (60​") ​     So when you are trying to find the Comp and Sub of 24 20​' ​the problem is setup like this:                      Find the measure of the unknown angles                               DMS (To convert from minutes to decimal degrees divide the minutes by 60 and the  seconds by 3600)                                    To convert decimal degrees to minutes & seconds multiply all decimals by 60 (remember to round  to the nearest minute)            Adding and subtracting angle measures        Finding the least positive coterminals    Coterminals are angles that differed by a multitude of 360  When the angle is less than 360 you add 360 to find the least positive. When the angle is above  360 you subtract it  (a lot by 360 or divide the number by 360, multiply your answer by 360, and  then subtract that from the original angle that was greater than 360.      ​ .      Sketching angles in standard position.  Angle x = 60  Find the least positive coterminal (LPC) of  angle x   Find the greatest negative coterminal (GNC)of angle x

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