Learn to Count by Common Radian Units

By Laura Shears

The target audience of this learning object is trigonometry students who have already learned what a radian is and have already derived the key values of the coordinates associated with common radian units, but now need to practice finding those values on the unit circle. The student does not need to know the definition of the six trig functions to do this activity.

Sine Bar

By Barbara Anderegg

In this learning activity you'll examine how a sine bar is used to measure angles.

Practical Trigonometry (Screencast)

After a brief review, the student solves five practical shop problems using right angle trigonometry.

What Is a Radian?

By Roy Peterson

In this learning activity you'll explore a graphical depiction of a radian for angular measurement.

Statics - Trig: The Pythagorean Theorem Using a TI-36XCalculator

By Steve Whitmoyer

In this animated and interactive object, the learner uses a TI-36X calculator to solve for the magnitude of the resultant and of one of the component forces in a right triangle.

Excel: Rectangular to Polar Conversion for the Phase Angle in Radians

By Patrick Hoppe

The conversion from rectangular to polar mode phase angle in radians is demonstrated in Excel.

Evaluating Trigonometric Ratios

In this learning activity you'll evaluate the Sine, Cosine, and Tangent ratios of a right triangle.

Evaluating the Six Trigonometric Functions

In this learning activity you'll evaluate the six trig functions using a scientific calculator.

Excel: Converting Radians to Degrees

Students read how to use the DEGREES() function to convert radians to degrees.

Statics - Trig: Law of Cosines Using a TI-86 Calculator

In this interactive and animated object, learners apply the Law of Cosines to determine forces using a TI-86 calculator.

Mathematical Expression of an AC Sine Wave

Students view the mathematical expression of an AC waveform with respect to time (t) and read about the different components of this expression.

Statics - Trig: Pythagorean Theorem Calculations Using Excel

Learners examine how to solve problems using the Pythagorean Theorem in Excel. Practice problems are included.

Statics - Trig: Pythagorean Theorem Calculations Using a Casio fx-260

In this animated and interactive object, the learner uses a Casio fx-260 calculator to solve for the magnitude of the resultant and of one of the component forces in a right triangle.

Statics - Trig: The Law of Sines Using a TI-86 Calculator

In this interactive and animated object, learners apply the Law of Sines to determine forces using a TI-86 calculator.

Law of Sines

In this learning activity you'll apply the Law of Sines in the solution on an oblique triangle when provided with two angles and the side opposite one of the angles.

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.

The TI-83 Plus Calculator: Using the Arctangent Function

Learners read how to use the arctangent function to calculate the theta of an angle. The proper keystrokes are displayed.

Statics - Trig: The Pythagorean Theorem

In this interactive object, learners use the Pythagorean Theorem to calculate forces.

Practical Trigonometry

Finding the Coordinates of the Point Where an Arc Blends Into a Line

By Alan Dohm

Students use trigonometry to find the coordinates of the blending point where a line and an arc meet. Learners are given the coordinates of the center of the arc, the radius of the arc, and the direction of the line.

Statics -- Trig: The Law of Sines

In this interactive object, students use the Law of Sines to calculate forces.

Statics - Trig: Pythagorean Theorem Calculations Using a TI-86

In this animated and interactive object, the learner uses a TI-86 calculator to solve for the magnitude of the resultant and of one of the component forces in a right triangle.

Statics - Trig: The Law of Cosines Using a TI-36X Calculator

Learners apply the Law of Cosines to determine forces using a TI-36X calculator in this animated object.

Statics - Trig: Law of Sines: Calculations Using a TI-36X Calculator

In this animated object, learners use a TI-36X calculator to determine forces.