In MATH 1316, one learns how to work with trigonometric
functions , identities, equations, and

applications of all of these. Students who wish to take scientific calculus must
learn the material

in MATH 1316 and MATH 2412, Precalculus, to prepare for MATH 2413, Calculus I.
To begin

the trigonometry course, it is necessary that you have completed the
prerequisite for the course

(one semester of high school trigonometry or precalculus or College Algebra or
the equivalent,

or recent completion of ACC's MATD 0390, Intermediate Algebra, with a B or
better) and that

you recall most of the geometry and how to use most of the algebraic techniques
you have

already learned. There is little or no review of algebra in the trigonometry
course.

The following problems provide a quick review of this algebra for students who
have completed

the prerequisite. The answers are listed at the end. If you find any of these
that you do not know

how to do correctly, you need to do one of two things before you enroll in MATH
1316:

1. Get an algebra book (at the Intermediate Algebra or College Algebra level)
and review

these topics until you can do all of these problems. If you do not have a book,
you may

check one out of the LRS, buy a non-current textbook at a used book store, buy
an

algebra book in the Schaum's Outline Series, or buy a current textbook.

2. If you are unable (or don't have time) to learn these topics by reviewing on
your own, you

need to take an algebra course to refresh your algebra skills. All of the
essential algebra

topics are covered in ACC's MATD 0390 (Intermediate Algebra) course and if you
take

that course and learn the material well, you will be prepared for MATH 1316.
Students

who have had two years of high school algebra or the equivalent and are able to
do only

about 2/3 of these right may choose to take MATH 1314 (College Algebra) to
prepare for

MATH 1316. MATH 1314 is a more difficult course than MATD 0390, but college
credit

is awarded for it.

**Problems:**

1. A ladder is leaning up against the side of a house. If the bottom of the
ladder is 7 feet from the

house and the ladder is 14 feet long, how far up the side of the house is the
top of the ladder?

2. Recall the geometrical theorem that says that the ratios of the corresponding
sides in similar

triangles are equal. Suppose that you want to measure the height of a building.
To do this, you

measure the building's shadow and find that it is 50 feet long. You also measure
the shadow of a

4-foot stake and find its shadow to be 3.5 feet long. How tall is the building?

3. Find the distance between the two points: (-1, 5) and (2, 12).

4. Find an equation for the line through the points
and .

5. Sam Jones has a total of $5000 invested in two accounts, one at 5% per year
and the other at

7% per year. The total amount of interest earned each year is $320. How much is
in each

account?

6. The price of a microwave oven has been discounted by
15%. The sale price is $339.15. What

is the original price of the microwave oven?

In 7-14, solve for x .

In 15 and 16, tell whether each system has none , only one,
or many solutions . If it has only one,

solve it.

17. For the function ,

a. Find

b. Find

18. Divide and simplify:

19. Graph

20. Graph on the
interval .

21. If you're given an equation with variables x and y and you want to find the
x and y intercepts

of the graph of the equation , how should you do it?

22. Simplify:

23. Simplify:

24. Simplify:

25. Solve for r :

Topic names and answers: (If you find misprints in the answers, please report
them to Mary

Parker.)

1. Pythagorean theorem: height is

2. Similar triangles: 57.14 feet

3. Distance formula:

4. Straight lines:

5. Interest word problem: $1500 at 5%, $3500 at 7%

6. Percentages: $399

7. Linear equations :

8. Quadratic equations , factorable:

9. Quadratic equations, general:

10. Formulas or literal equations (linear):

11. Formulas or literal equations (quadratic):

12. Rational equations:

13. Rational equations:

14. Rational equations (notice how to check for extraneous roots ):

15. Systems of equations:

16. Systems of equations: No solution

17. Function notation: 19 and

18. Factoring and rational expressions:

19. Graphing circles : circle, center at , radius 1

20. Graphing quadratic functions: a parabola, opening upward, with x intercepts
at -1 and 2.

21. Graphing lines If you have the graph, simply look for the intercepts. With
the equation,

set and solve for x to find the x-intercepts. Set
and solve for y to find the y-intercepts.

22. Rational expressions :

23. Rational exponents :

24. Rational exponents:

25. Formulas or literal equations (rational): or