Whitehall District Schools ► Pre-Calculus ► Pre-Calc ► Trig Unit 3: Analytic Trig and Applications ► 5.3 and 5.4 Sum/Difference Identities

• 5.3 and 5.4 Sum/Difference Identities 11 
  • Find the exact value by using a sum or difference identity.sin 15°
  • Find the exact value by using a sum or difference identity.tan 75°
  • Solve the problem.When a person bends at the waist with a straight back, the ...
  • Use a sum or difference identity to find the exact value.tan 
  • Use Identities to find the exact value.cos -75°
  • Use Identities to find the exact value.cos 165°
  • Use Identities to find the exact value.cos 36° cos 24° - sin 36° sin 24°
  • Use identities to write each expression as a function of θ.cos (θ + 90°)
  • Use the cofunction identities to find an angle θ that makes the statement ...
  • Use trigonometric identities to find the exact value.sin 20° cos 100° + cos ...
  • Write in terms of the cofunction of a complementary angle.sec 68° 28'