I really like the simplicity of this One or Negative One? Trig Identities Task that I found in the 8th Edition of Demana and Waits’ Pre-Calculus Textbook (Section 5.1). That’s why I decided to turn it into a worksheet! Trig identities are one of my favorite topics to teach in Pre-Calculus. To me, they are …

# Trig Identities

Several years ago, I created a double angle identities joke worksheet as a promposal when one of my trig students wanted to ask another student in the class to prom. I shared the file, but it was really only useful if you had a student named Sam who wanted to ask another student to prom. …

A few weeks ago, I tweeted about a trig identities matching activity I created. I promised to share the files, so that is what I am doing today. Sorry it’s late! This is a different activity than the trig identity group challenge I shared a couple of weeks ago. In fact, I actually used this …

I created this free printable trig identities cheat sheet for my Pre-Calculus students to reference as we work through our unit on trigonometric identities. I do not require my pre-calc students to memorize the various trig identities. I am more interested in my students being able to use and apply trig identities than to be …

I created this Verifying Trig Identities Worksheet for my Pre-Calculus students to have some extra practice during our unit on trigonometric identities. Students are asked to verify each trig identity. More specifically, they are to show that one side of the equation is equivalent to the other side of the equation. Students must show each …

This past week, my pre-calculus students have been tackling verifying trig identities. I came down with a cold Sunday night, took Monday off at the insistence of my husband, and suffered through the rest of the week. Introducing trig identities while sick and lacking energy/motivation on Tuesday was not my best and brightest idea. So, …

A promposal including a double angle identities worksheet? Read on for details! I’ve never really understood the big idea behind promposals. Part of that probably has to do with the fact that I never went to prom in high school. But, I recently got the chance to be a part of one, and it was …