| 103864 | Finding the Exact Value Using the Formula for the Cosine of the Difference of Two Angles | Easy | |
| 103866 | Finding the Exact Value Using the Formula for the Sum of Two Angles for Cosine | Easy | |
| 103868 | Using Sum and Difference Identities to Evaluate the Difference of Angles | Easy | |
| 103869 | Finding the Exact Value of an Expression Involving an Inverse Trigonometric Function | Easy | |
| 103870 | Finding the Exact Value of an Expression Involving Tangent | Easy | |
| 103873 | Finding a Cofunction with the Same Value as the Given Expression | Easy | |
| 103875 | Verifying an Identity Involving Sine | Easy | |
| 103876 | Verifying an Identity Involving Tangent | Easy | |
| 103877 | Sum and Difference Identities · Try It 5 | Easy | |
| 103878 | Sum and Difference Identities · Exercise 1 | Easy | |
| 103880 | Sum and Difference Identities · Exercise 3 | Easy | |
| 103935 | Using the Double-Angle Formula for Cosine without Exact Values | Easy | |
| 103936 | Using the Double-Angle Formulas to Verify an Identity | Easy | |
| 103937 | Double-Angle, Half-Angle, and Reduction Formulas · Try It 2 | Easy | |
| 103938 | Verifying a Double-Angle Identity for Tangent | Easy | |
| 103939 | Double-Angle, Half-Angle, and Reduction Formulas · Try It 3 | Easy | |
| 103940 | Writing an Equivalent Expression Not Containing Powers Greater Than 1 | Easy | |
| 103941 | Using the Power-Reducing Formulas to Prove an Identity | Easy | |
| 103942 | Double-Angle, Half-Angle, and Reduction Formulas · Try It 4 | Easy | |
| 103943 | Using a Half-Angle Formula to Find the Exact Value of a Sine Function | Easy | |
| 103947 | Double-Angle, Half-Angle, and Reduction Formulas · Exercise 1 | Easy | |
| 103949 | Double-Angle, Half-Angle, and Reduction Formulas · Exercise 3 | Easy | |
| 104010 | Writing the Product as a Sum Using the Product-to-Sum Formula for Cosine | Easy | |
| 104012 | Writing the Product as a Sum Containing only Sine or Cosine | Easy | |
| 104014 | Express the Product as a Sum or Difference | Easy | |
| 104016 | Writing the Difference of Sines as a Product | Easy | |
| 104018 | Evaluating Using the Sum-to-Product Formula | Easy | |
| 104019 | Proving an Identity | Easy | |
| 104020 | Verifying the Identity Using Double-Angle Formulas and Reciprocal Identities | Easy | |
| 104021 | Sum-to-Product and Product-to-Sum Formulas · Try It 5 | Easy | |
| 104022 | Sum-to-Product and Product-to-Sum Formulas · Exercise 1 | Easy | |
| 107348 | Finding the Exact Value Using the Formula for the Sum of Two Angles for Cosine | Easy | |
| 107350 | Using Sum and Difference Identities to Evaluate the Difference of Angles | Easy | |
| 107351 | Finding the Exact Value of an Expression Involving an Inverse Trigonometric Function | Easy | |
| 107367 | Using the Double-Angle Formulas to Establish an Identity | Easy | |
| 107368 | Double-Angle, Half-Angle, and Reduction Formulas · Try It 2 | Easy | |
| 107369 | Using a Half-Angle Formula to Find the Exact Value of a Sine Function | Easy | |
| 107383 | Evaluating Using the Sum-to-Product Formula | Easy | |
| 103865 | Sum and Difference Identities · Try It 1 | Easy | |
| 103867 | Sum and Difference Identities · Try It 2 | Easy | |
| 103871 | Sum and Difference Identities · Try It 3 | Easy | |
| 103874 | Sum and Difference Identities · Try It 4 | Easy | |
| 103934 | Double-Angle, Half-Angle, and Reduction Formulas · Try It 1 | Easy | |
| 103945 | Double-Angle, Half-Angle, and Reduction Formulas · Try It 5 | Easy | |
| 104011 | Sum-to-Product and Product-to-Sum Formulas · Try It 1 | Easy | |
| 104013 | Sum-to-Product and Product-to-Sum Formulas · Try It 2 | Easy | |
| 104015 | Sum-to-Product and Product-to-Sum Formulas · Try It 3 | Easy | |
| 104017 | Sum-to-Product and Product-to-Sum Formulas · Try It 4 | Easy | |
| 107349 | Sum and Difference Identities · Try It 2 | Easy | |
| 107366 | Double-Angle, Half-Angle, and Reduction Formulas · Try It 1 | Easy | |