Use the same sheet of paper as yesterday. Students, Take out your calendar and your homework. Take out your spiral notebook and Complete the DNA. Use your notes if necessary. Use the same sheet of paper as yesterday. Below yesterday’s quiz put the title: “Quiz 11/15/11.” Number your paper #1-9 down the left side (Do not skip spaces) If you were absent, Use a fresh sheet of paper.

Complete each trigonometric identity. Complete each identity. Quiz 11/15/11 – Write the answers only. Complete each trigonometric identity. Complete each identity.

Guidelines for Verifying Identities 1. Start with the most complicated side of the equation. 2. Factor an expression, add fractions, square a binomial, or create s monomial denominator, if possible. 3. Use the fundamental identities, whenever possible. 4. Convert all terms to sines and cosines. 5. Always try something. Guidelines for Verifying Identities

Verify the identity.

Verify each identity algebraically. Then check graphically.

Verify each identity.

Factor each trig expression.

Example

Factor each trig expression.

Example

Graph each expression. Find all the zeros.

Linear and Angular Speed 2) The circular blade on a saw rotates at 2400 revolutions per minute. Find the angular speed in radians per second. The blade has a radius of 4 inches. Find the linear speed of a blade tip in inches per second.

Write in terms of sine and cosine. Students, Take out your calendar and your homework. Take out your spiral notebook and Complete the DNA. Use your notes if necessary. Write in terms of sine and cosine. Complete each trigonometric identity.