Whitehall District Schools ► Pre-Calculus ► Pre-Calc ► Trig Unit 3: Analytic Trig and Applications ► 5.5 Double Angle Identities

• 5.5 Double Angle Identities 4 
  • Solve the problem.Suppose that for an electrical appliance, voltage is given ...
  • Use an identity to write the expression as a single trigonometric function ...
  • Use identities to find the indicated value for each angle measure.cos θ = , ...
  • Write the product as a sum or difference of trigonometric functions.cos 44° ...