Standard-Position Angles and Reference Angles
By Kevin Ritzman
The learner will recognize standard-position angles and find the reference angle for any standard-position angle.
Mathematical Expression of an AC Sine Wave
By Patrick Hoppe
Students view the mathematical expression of an AC waveform with respect to time (t) and read about the different components of this expression.
Excel: Converting Radians to Degrees
Students read how to use the DEGREES() function to convert radians to degrees.
What Is a Radian?
By Roy Peterson
In this learning activity you'll explore a graphical depiction of a radian for angular measurement.
Evaluating the Six Trigonometric Functions
In this learning activity you'll evaluate the six trig functions using a scientific calculator.
Excel: Rectangular to Polar Conversion for the Phase Angle in Radians
The conversion from rectangular to polar mode phase angle in radians is demonstrated in Excel.
Sine Bar
By Barbara Anderegg
In this learning activity you'll examine how a sine bar is used to measure angles.