MAT129 Fall 2025 Notes
mathnstuff.com/math/precalc/MAT129fa25/p.17.htm
© 2025 A2, Agnes Azzolino
Inverse Trigonometric Functions; Applications, Text 8.3, PG. 677

Welcome to Precalc!
Yes, There is a Video, Also
Hi,
    To "take an inverse" means to "undo."
    The inverse of "addition" is "subtraction." The inverse of "take the opposite" is also "take the opposite." The inverse of "take the reciprocal" is also "take the reciprocal."
    The inverse of "square a number" is, with restrictions, "take a square root."
    The inverse of "take a derivative" is, with restrictions, "take an antiderivative."
    Take an antiderivative, that's the topic for today, and the rest of the semester.
      Last day to drop without evaluation is November 6, 2025. Watch the video or pink-box me and request an office hour.
    Contact me through the pink box on www.mathnstuff.com/math/math.htm or with the phone number on your class CANVAS home page.
    Stay safe, A2

P.S.     TEST3 (20% of course grade) on 5.1-5.6, 6.1-6.7, on Lesson18, on Th11/6 & M11/10, is mailed, not posted!

"November 6:
Last day to withdraw from full term courses"

Can you earn the grade you need? Watch the video: "It's The Last Day to Drop and I Don't Know What to Do Video." 
  Learning Objectives
	* Understand and use the inverse sine, cosine, and tangent functions.
	* Find the exact value of expressions involving the inverse sine, cosine, and tangent functions.
	* Use a calculator to evaluate inverse trigonometric functions.
	* Find exact values of composite functions with inverse trigonometric functions.
    See Arithmetic Stuff:
  • inverse -- Inverse Math Spoken Here! dictionary definition
  • problems pdf -- * 3 Problems & Answers set up to first take an inverse graphically then room for algebraically
8.3 Arc Functons (In Precalc)
web page
pdf of web page
solve.xls
elevation.gps
inverse.gsp
video on web
local video
  Input a number x here in the yellow box, then press each button
to compute the angle whose sine (the Arcsine of x) or whose
cosine (the Arccosine of x), or whose tangent (Arctangent of x) is x.
x is

  is rad
  is rad
  is rad

  is °
  is °
  is °


answers to con-dots