TRIGONOMETRIC IDENTITIES & EQUATIONS
More definitions: The tan function, Pythagorean Identity, Co-function
tan and Pythagorean Identity
Co-function Identity
Solving Equations
sin 𝜃
cos 𝜃
tan 𝜃
Equations with Linear Inputs
•Change the range
•Solve for new range first
•Solve these for 𝑥, 𝜃, etc.
Pure Year 1, Chapter 10
Solve sin 𝑥 = 0.6, giving your answers to the nearest degree.
Solve cos 𝜃 = −0.3, −180° < 𝜃 < 180°,
giving your answers to 1dp.
Solve for 0° < 𝑥 < 90°, giving your answers to 1dp.
5sin 2𝑥 − 20 ° + 2cos(2𝑥 − 20)° = 0
