Chapter 5: Section 5: Multiple-Angle and Product-to-Sum Formulas
No. 12 Solving a Trigonometric Equation by Using a Double Angle Formula
No. 20 Solving a Trigonometric Equation by Using the Double Angle Formulas
No. 24 Finding the Exact Values of Trigonometric Functions by Using the Double Angle Formulas
No. 40 Rewriting a Given Expression by Using the Power-Reducing Formulas
No. 49d Finding the Exact Values of a Trigonometric Function by Using the Half-Angle Formulas
No. 55 Finding the Exact Values of Trigonometric Functions by Using the Half-Angle Formulas
No. 62 Finding the Exact Values of Trigonometric Functions by Using the Half-Angle Formulas
No. 70 Solving a Trigonometric Equation by Using a Half-Angle Formula
No. 77 Writing a Product as a Sum or Difference by Using a Product-to-Sum Formula
No. 81 Writing a Difference as a Product by Using a Sum-to-Product Formula