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Radian Conversion

Q: What is a radian?

A: A radian is the angle measured between radii of a circle which are subtended by an arc which has the same length as the radii.

It may be easier to remember: a radian is just another measure of an angle, just like degrees.

1 radian = 57.2958 ° . . . → Read More: Radian Conversion

Graphing Trig Functions

Q: How do I graph trigonometry functions?

A: Always picture the regular graphs of y=sin(x) and y=cos(x) and then apply each of the transformations to those original graphs.

The amplitude of each graph is 1, and the period is .

The general equation for a sine graph is: . . . → Read More: Graphing Trig Functions

Graphing Trig Functions, y=3sin(x) + 4

Q: How do I graph y=3sin(x) + 4?

A: Remember that the standard form for a trigonometric equation is:

y=A*sin(B(x-C)) + D

In your case A=3, B=1, C=0 and D=4

The A=3 term means that the graph is stretched vertically 3 units. B=1 and C=0 mean that the period of the graph is . . . → Read More: Graphing Trig Functions, y=3sin(x) + 4

Guides to Trig Functions

Math12.com has an excellent guide to Trigonometric Functions.

These are links to PDF files.

Part 1 (Angle Basics) Part 2 (The Unit Circle) Part 3 (Trig Ratios) Part 4 (Graphing Trig Functions I) Part 5 (Graphing Trig Functions II) Part 6 (Graphing Trig Functions III) Part 7 (Radian Graphs) Part 8 (Real Life Applications . . . → Read More: Guides to Trig Functions