623 - E block - due Tuesday 13.11.19

finish chapter 10 review 2 - trig!!

review 2 solutions
page 1
page 2
page 3
page 4

CHAPTER 10 BIG QUIZ TUESDAY!! 

NO CALC

- GSTK sheet - be able to fill it out

- finding exact values (using GSTK)
     ex: sin 120 - ref < (distance from x-axis) is 60.
         120 is in quad 2 where y (and sin) is positive.
         sin of 60 is rt 3 / 2 (positive)

- finding angles (using exact values)
      ex. tan X = -1
          ref angle is 45 degrees
          tan is negative in quadrants 2 and 4
          ref angle of 45 in quadrant 2 = 135
          ref angle of 45 in quadrant 4 = 315

- graph - be able to graph both sine and cosine (just as it is on the sheet)

CALC

- SOH - CAH - TOA - use to find sides and angles in right triangles
      if you are looking for an angle - use inverse

- laws of sines and cosines - use to find angles and sides in not right triangles
      if you are looking for an angle - use inverse  (last step)
      use law of cosines when you have SSS or SAS.

- pythag identity
  (cos X)^2 + (sin X)^2 = 1 - know how to use it