Trigonometry

College and School of Mathematics

Math::Elementary Algebra::Grade VI::Integers

Just when you think you know everything about numbers comes along negative numbers. "Negative numbers?!," you might say. How can numbers be negative?

Well, negative numbers do exist. They are part of the Integer numbers.

If you draw a number line, the right part of the line goes to positive infinity while the left part of the line goes to negative infinity. From 0 to negative infinity are the negative integers, -1, -2, -3, and so on.

Here are some integer questions. Solve the following questions.

1. Is 0 a positive integer?
2. -1 + 2 = ?
3. 3 - -4 = ?
4. 5 x -6 = ?
5. -100 + 100 = ?

John Sindayen

Math::Trigonometry::College Freshman

Trigonometry is the study of triangles and their angles. Sailors and mariners used trigonometry in the old days before computers were born, or rather invented. They take out their sextant, point to a star, then compute their location in the sea or ocean using trigonometry.

Learning trigonometry is easy, especially if you're going out to sea. But you need some basic facts about triangles and angles.

There are basically three types of triangles. There is the acute triangle, the obtuse triangle, and the most important right triangle.

There are also basically three types of angles: an acute angle, obtuse angle, and the most used one, the right angle which some people remember by being perpendicular.

Here some trig questions. Name the degrees and radians that apply to the following angles.

1. Acute
2. Right
3. Obtuse
4. Straight
5. No angle

Trigonometry Reference:
https://groups.google.com/forum/#!topic/soc.genealogy.britain/joeXUf4enag

Ship Ahoy!

John Sindayen