In these two videos we learn how to graph waves using trigonometric functions.
In these videos we learn about the graphs of sin(x) and cos(x).
In this video we learn three new trig ratios called the reciprocal ratios. (secant,cosecant,and cotangent)
More about why the unit circle is useful.
In this video I introduce the unit circle.
What is a radian?
Here is a video about them. There is also more information below the video.
A radian is a unit of measuring angles just like a degree is. A radian is a distance on the circle’s circumference which is equal to 1 radius.
This means there are radians in one circle or that radians equals 360 degrees.
If radians equals 360 degrees that means that 1 degree equals divided by 360 radians or divided by 180 radians.
1 radian = degrees
1 degree = radians
This is a degrees and radians chart. If 1 degree = radians then 30 degrees equals 30 times that or radians. The same thing can be done to find the radian measure for other angles.
More about solving for the side of a triangle using trigonometry.