# Math 145 - Applied Trigonometry

## Course Coordinator

Dane Mayhook (dmayhook@iastate.edu)

## Catalog Description

MATH 145. Applied Trigonometry
(2-1) Cr. 3 F.S. Prereq: Satisfactory performance on placement exam, 2 years of high school algebra, 1 year of high school geometry, or enrollment in MATH 140.
Mathematical ideas regarding the conception of space. General Trigonometry, with an emphasis on the calculation of lengths, areas, and angles. The Law of Sines and the Law of Cosines. Polar, cylindrical, and spherical coordinate systems. Conic sections and Quadric Surfaces. Students in the College of Liberal Arts and Sciences may not count Math 145 toward the General Education Requirements. Only one of Math 143 and 145 may count toward graduation..

## Textbook

Tokorcheck
Trigonometry, Geometry, and the Conception of Space
ISBN: 978-1-62661-948-7

## Syllabus

Chapter & Sections Topics Time
Module One: Definitions 3 weeks
Lessons 1 − 5
Module Two: Applications 4 weeks
Lessons 6 − 11
Module Three: Coordinate Systems 3 weeks
Lessons 12 − 16
Module Four: Conics 3 weeks
Lessons 17-20
Lessons 21-24

## Objectives

### MODULE ONE: DEFINITIONS LESSONS 1 − 5 (3 Weeks)

• Understand general definitions regarding sets, particularly sets of numbers.
• Distinguish between integers, rational numbers, and irrational numbers.
• Use units of measure and convert between units, using dimensional analysis.
• Understand both radian and degree measures and how to translate between them.
• Know the six trigonometric ratios. Be able to evaluate trigonometric ratios using both a calculator and the Unit Circle.
• Given data about a right triangle, be able to find any missing side lengths or angles.

### MODULE TWO: APPLICATIONS LESSONS 6 − 11 (4 Weeks)

• Understand concepts relating to functions, such as their domains, ranges, and
• whether or not they are one-to-one.
• Know the six inverse-trigonometric functions. Be able to evaluate trigonometric ratios using both a calculator and the Unit Circle.
• Be able to solve equations relating an unknown angle, either for a unique solution or over an interval.
• Use basic trigonometric identities, such as the Sum/Difference Formulas, the Law of Sines, and the Law of Cosines, to help solve equations.
• Construct and solve equations for a variety of real-world examples.
• Be able to find unknown side lengths or angles for general triangles.

### MODULE THREE: COORDINATE SYSTEMS LESSONS 12 − 16 (3 Weeks)

• Use Polar Coordinates to describe points or equations in two dimensions, and
• convert between them and rectangular coordinates.
• Use Cylindrical Coordinates to describe points or equations in three dimensions, and convert between them and rectangular coordinates.
• Use Spherical Coordinates to describe points or equations in three dimensions, and convert between them and rectangular coordinates.
• Be able to graph sinusoidal curves, and identify features such as amplitude and period.
• Manipulate the sine function and its graph using transformations of the plane.

### MODULE FOUR: CONICS LESSONS 17 − 20 (3 Weeks)

• Recognize the graphs and equations of parabolas, ellipses, and hyperbolas.
• Complete the square to put quadratic equations into standard forms.
• Analyze the equations of conics to identify features such as foci and vertices. Modify a given conic section using graph transformations.

### MODULE FIVE: QUADRICS LESSONS 21 − 24 (3 Weeks)

• Use level curves to describe general surfaces in R3.
• Be able to both identify and generate surfaces of rotation and their features.
• Recognize the graphs and equations of cones, ellipsoids, paraboloids, and hyperboloids in R3 .
• Be able to sketch a given quadric surface, and its intersection with specified hori-zontal and vertical planes.

(none provided)

## Official Math Department Policies

The Math Department Class Policies page describes the official policies that all instructors have to follow. It covers rules on make-up exams, cheating, student behavior, etc.

## Students With Disabilities

If you have a documented disability and require accommodations, you should obtain a Student Academic Accommodation Request (SAAR) from the Disability Resources office (Student Services Building, Room 1076, 294-6624 or TDD 294-6335, disabilityresources@iastate.edu or accommodations@iastate.edu). Please contact your instructor early in the semester so that your learning needs may be appropriately met.