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삼각함수
Trigonometry
Students need the best teacher, so
you need examples, because examples are the best teacher. All the examples here
are fully worked, and help you do math better.
And this book is about a math tool
called trigonometry. Why trigonometry
though?
That’s primarily because we often
get to work with angles not only doing geometry but doing algebra, too. Doing
school math, we can hardly avoid and stay away from algebra. And doing
geometry, too, we often get to do algebra on expressions with angles. And
doing such algebra, we do trig algebra.
Also, we need to do trigonometry working
with vectors and many others that have to do with angles. Working with such,
we often need to find components with angles. Finding such components, we use
tools in trigonometry. And the tools are called trigonometric ratios, often
called trig ratios for short.
So doing trigonometry, we get to use
trig ratios called sines, cosines, etc., together with a bit bigger tools
called trig identities, rules, or formulas. So in this book, you get to know
what those tools are and what they are about. So you will get to know how
those tools work, what you can do with them, and how to work with them.
Thus, you will get to learn, for
instance, how the trig ratio called the sine is made, what it is about, and
how to use it. And you will see why you have to multiply by the ratio as the
sine, the cosine, or the tangent, and will see what you get multiplying by
it.
And of course, you will get to learn
those important tools called trig identities and trig formulas such as the
Sine Rule and the Cosine Rule. Besides, you will get to see and be familiar
with special tools called trig functions.
You will get them all through
examples, so those tools will get explained with examples fully worked and
detailed. Also, following steps to the solution in each example, you will be
more familiar with the tools and the the concepts.
And you will get to strengthen your algebra.
So doing problems, as well as learning math concepts, you can do better and
faster so that your math can run not only properly but fast enough, too.
You can read or get the sample
downloaded clicking the logo button below.
Using a pdf reader, your reading the sample is much easier.
May your math run very well.
Seong R. Kim
M.S. Math.
Rensselaer Polytechnic Institute
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