# Math for Metering 2 - Graphs, Phasors – Watch Instant Video

### Training Sessions

Basic Graph Characteristics
Phasors and Phasor Diagrams
Basic Trigonometric Principles
Applying Math to Metering
##### Training Sessions

Basic Graph Characteristics – 7 minutes
Identifies characteristics of an X-Y graph. Demonstrates how values can be located and plotted on an X-Y graph. Describes how some of the characteristics of a basic X-Y graph are related to sine wave graphs and phasor diagrams.

Phasors and Phasor Diagrams – 11 minutes
Explains what a phasor is, identifies phasors commonly used in electrical applications, and explains how a phasor can be used to represent the magnitude and direction of a quantity. Describes or demonstrates three methods of phasor addition.

Basic Trigonometric Principles – 9 minutes
Describes the characteristics of a right triangle. Explains how the Pythagorean theorem can be used to calculate the value of one side of a right triangle, when the values of the other two sides are known. Explains how to determine the sine, cosine, and tangent of an angle.

Applying Math to Metering – 10 minutes
Explains how to: use current and voltage values to determine the power drawn by a circuit, determine the power factor for a circuit using the cosine function, use a power triangle to determine the apparent power drawn by a circuit.