Trigonometry - Fall 2019 - Tues and Thurs 12-12:50am - Room 228

Instructor: Ted Wetherbee

Fond du Lac Tribal & Community College
2101 14th Street
Cloquet, Minnesota 55720

Office: W217
Phone: 218-879-0840

Fall 2019 Class Schedule:
  8-8:50am   MTWHF  Calculus 1           Room 228
  12-12:50pm MWF    College Algebra      Room 228
  12-12:50pm TH     Trigonometry         Room 228
  -online-          Intro. to Pogramming -online-

Office Hours in Room W217:
  Monday   Tuesday  Wednesday  Thursday  Friday
  11-noon  11-noon  11-noon    11-noon   11-noon

Course Website:

All materials handed out in class will be online from this web site. You can also naviage from this simpler URL:

All current and past assignments are on the course website listed by date under the tentative schedule.

Textbook (Free online; inexpensive in the FDLTCC bookstore)

Trigonometry, by Michael Corral
Textbook Web Site:
The bookstore ordered printed copies, and these are relatively inexpensive.  However,
this book is also free.

(extra material on vectors) Precalculus by senior author Jay Abramson
The section on vectors under Trigonometry : Other Topics.

(extra material on vectors) Calculus 3 (sections 2.1 to 2.5) by Gilbert Strang
The sections on vectors, 2.1 through 2.5 .

Local PDF files of textbooks :

Calculators, Computers, PEDs (Personal Electronic Devices)

You may have a calculator already, but make sure that it is a scientific calculator. If you need to buy one, I recommend a cheap calculator like a TI-30XS. This does what you need, and the bookstore sells them for under $20 .

The TI 83+ and 84 are the most popular TI models, but the TI 85 and 86 also work well. Casio also has nice graphing calculators. The TI 89 is harder to use for this class and is just about the same cost as a mini- notebook computer which can be loaded up with free and better mathematical software. In any case, bring a scientific calculator to class. You can use these for exams and quizzes.

Do not play games, email, text, chat, surf, talk, etc. etc. on your PEDs. Turn these things off during class and put them away. At times a PED, laptop, or other computer device may be useful in class. Still, turn them off and put them away until you are told when they will be useful and allowed. PEDs and computers are not allowed for exams or quizzes.

SageMath: (later)

This is software like Mathematica and Maple which can do symbolic algebra, graphing, and many other mathematical things, but SageMath is free. You can download it yourself from then install on a Gnu/Linux machine, but it is probably easier to use the FDLTCC server above.

You can also use URL because this is a secure connection which is redirected from; the "s" after "http" means secure. You may be told that there is no security certificate, and there is not one yet for this web site. You can safely add an exception for this sagemath website to just do math. (You should never do this for online banking or any other online service which handles anything personal which must be secure.)

Note that these are class accounts, so everyone will be able to see work done by everyone else. There is no privacy. Put nothing private or even identifiable to yourself online--which is excellent advice for everything on any Internet service. Make up worksheet names which you can remember yet which are not identifiable to yourself, and use these just for math.

Exams and Grading

2 tests     2x100 = 200
1 final             150
15 homework 5x15 =  75
                    425 total

90-100%   A
80-90%    B
70-80%    C
60-70%    D
0-60%     F

The Course

This course addresses FDLTCC liberal education requirements (Competencies Across the Curriculum) in problem solving and technology. You should come to class everyday! This is the easy way to do well in any course, and it is especially true for math classes. There are exercises in the text for you to do, and these are usually answered at the end of each chapter. You will also get homework assignments on handouts, and you should complete then hand these in at the beginning of the next class. You homework grade is based on completing and turning in these homework handouts. You will also get sample exams which will be similar in length and content to the in-class exams. Let me know if there is are accommodations you need for the class.

Tentative Schedule

Tue aug27  1 1.1 angles                          h1
Thu aug29  2 1.2 trig functions of acute angles  h2

Tue sep03  3 1.3 solving right triangles         h3
Thu sep05  4 1.3

Tue sep10  5 1.4 trig functions of any angle     h4
Thu sep12  6 2.1 law of sines                    h5

Tue sep17  7 2.2 law of cosines                  h6
Thu sep19  8 2.2                  

Tue sep24  9 2.4 area of a triangle              h7
Thu sep26 10 2.5 circumscribed and inscribed triangles  h8

Tue oct01 11 T1 review                           Sample Test 1
Thu oct03 12 T1  

Tue oct08 13 3.1 basic trig identities           h9
Thu oct10 14 3.2 sum and differences formulas    h10

Tue oct15 15 class cancelled
Thu oct18 NC No Classes

Tue oct22 16 3.3 double and half angles formulas h11
Thu oct24 17 4.1 radians and degrees             h12

Tue oct29 18 4.2 arc length; 4.3 area of a sector; 4.4 cicular motion; linear and angular speed
Thu oct31 19 5.1 graphing trig functions         h13

Tue nov05 20 5.2 properties of graphs of trig functions
Thu nov07 21 5.3 inverse trig functions          h14

Tue nov12 22 T2                                  Sample Test 2
Thu nov14 23 6.1 solving trig equations          h15

Tue nov19 24 6.3 complex numbers                 
Thu nov21 25 6.3

Tue nov26 26 6.3                                 
Thu nov28  H Holiday

Tue dec03 27 vectors                             
Thu dec05 28 vectors and dot product

Tue dec10 29 cross products and applications
Thu dec12 30 final exam review 

Tue dec17 T1 12-1:50pm Room 228 (math1015)
Wed dec18 T2  8-9:50am Room 228 (math2001), 12- 1:50pm Room 228 (math1010)
Thu dec19 T3
Fri dec20 T4

Plagiarism, or presenting the writing of another as your own (a.k.a. “copying”), results in an F for this course and is subject to any other disciplinary actions mandated by this institution and the Minnesota State system.

Disabilities Notice Fond du Lac Tribal &Community College is committed to providing equitable access to learning opportunities for all students. Under the Americans with Disabilities Act and Section 504 of the Rehab Act, Fond du Lac Tribal &Community College provides students with disabilities (e.g., mental health, attentional, learning, chronic health, sensory or physical) reasonable accommodation to participate in educational programs, activities or services. Students with disabilities requiring accommodation to participate in class activities or meet course requirements should first complete an intake form and necessary requirements with Nancy Olsen, Disability Services coordinator, to establish an accommodation plan. She can be reached at or 218-879-0819.

Sexual Violence
Fond du Lac Tribal &Community College is committed to providing an environment free of all forms of discrimination and sexual harassment, including sexual assault, domestic and dating violence, gender or sex-based bullying and stalking. If you or someone you know has experienced gender or sex-based violence (intimate partner violence, attempted or completed sexual assault, harassment, coercion, stalking, etc.), know that you are not alone. Fond du Lac Tribal &Community College has staff members trained to support survivors in navigating campus life, accessing resources, providing accommodations, assistance completing with protective orders and advocacy. For more information regarding the Campus Security Report, the following link will give you a report on the Clery Compliance and Security Report at FDLTCC: Please be aware that all Fond du Lac Tribal &Community College employees are required to report any incidents of sexual violence and, therefore it cannot guarantee the confidentiality of a report, but it will consider a request for confidentiality and respect it to the fullest extent possible. If you wish to report sexual misconduct or have questions about school policies and procedures regarding sexual misconduct, please contact Anita Hanson, Dean of Student Services, at 218-879-0805 or
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