Students will practice finding the exact value of a trigonometric function using the Product-to-Sum and Sum-to-Product Identities with this “Triples” Activity. Some angles are given in radians and some are given in degrees.

Students find the exact value for each of the 24 cards using the identities, then look for the matching “triples”. There will be 8 sets of three cards, each having the same answer. I recommend that students work in groups of 3-4 on this activity. They can show their work directly on the back of the card, or on a separate sheet of paper if you prefer. Once they are finished, I have my students staple their “triples” together and place in a zip-lock bag.

An answer key to use to ensure the correct cards and matched.

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**Algebra 2 & Pre-Calculus Activities Bundle**

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