# Trig and Precal

## A2-33: DIRECTION COSINES MODEL

Category: A2 Mathematics
Purpose: Aid in perception of the components of a three-dimensional vector

## A2-32: HEIGHT MEASUREMENT BY TRIGONOMETRY

Category: A2 Mathematics
Purpose: Determine the height of a student using trigonometry

## A2-11: CIRCUMFERENCE VS. DIAMETER - CHAIN ON CYLINDER

Category: A2 Mathematics
Purpose: Show the relationship between the diameter and the circumference of a circle

## A2-13: ELLIPSE DRAWING BOARD

Category: A2 Mathematics
Purpose: Demonstrate one method of drawing ellipses

## A2-14: DISSECTIBLE CONE

Category: A2 Mathematics
Purpose: Illustration of the conic sections
• #### A2-01: CARTESIAN COORDINATE AXES

Illustrate a standard right-handed cartesian coordinate system Read More
• #### A2-02: XYZ AXES ON EXTENDED HANDLE

Aid in discussing angular momentum Read More
• #### A2-11: CIRCUMFERENCE VS. DIAMETER - CHAIN ON CYLINDER

Show the relationship between the diameter and the circumference of a circle Read More
• #### A2-12: SLATED SPHERE

Demonstrate rotation and spherical geometry Read More
• #### A2-13: ELLIPSE DRAWING BOARD

Demonstrate one method of drawing ellipses Read More
• #### A2-14: DISSECTIBLE CONE

Illustration of the conic sections Read More
• #### A2-15: HYPERBOLOID FROM STRAIGHT LINES

Approximate the hyperboloid Read More
• #### A2-16: SADDLE POINT MODEL

Illustrate the geometry of a saddle point Read More
• #### A2-17: CLOSED CURVES AND CAPPING SURFACES

Illustrate various complicated closed curves Read More
• #### A2-21: MAGNETIC VECTOR BOARD

Demonstrate properties of vectors Read More
• #### A2-22: MAGNETIC VECTORS - LECTURE HALL BLACKBOARDS

Demonstration of vector properties Read More
• #### A2-23: VECTOR PRODUCT

Illustrate the product of two vectors Read More
• #### A2-24: TWO-DIMENSIONAL VECTOR ALGEBRA

Illustrate aspects of vector algebra Read More
• #### A2-32: HEIGHT MEASUREMENT BY TRIGONOMETRY

Determine the height of a student using trigonometry Read More
• #### A2-33: DIRECTION COSINES MODEL

Aid in perception of the components of a three-dimensional vector Read More
• #### A2-51: PROBABILITY BOARD - PROJECTION

Demonstrates Gaussian distribution Read More
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