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

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

Evaluating the Six Trigonometric Functions

By Roy Peterson

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

Evaluating Trigonometric Ratios

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

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.

Excel: Converting Radians to Degrees

By Patrick Hoppe

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

Statics -- Trig: The Law of Sines

By Steve Whitmoyer

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

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

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.

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.

Statics - Trig: The Pythagorean Theorem

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

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

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

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.

What Is a Radian?

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

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.

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.

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.

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.

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 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.

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.