Episode 11 — 2D & 3D Trigonometry

Reduction Formulae Question 1

Learners will be able to:

• Identify the quadrant in which an angle falls based on its measure. • Apply reduction formulae to simplify trigonometric expressions involving 180 degrees plus beta and 360 degrees plus beta. • Explain how cos of 90 minus beta is equivalent to sin of beta using a right-angled triangle. • Simplify a fraction by cancelling out like terms in the numerator and denominator. • Use the quotient identity (tan = sin/cos) to rewrite an expression involving tan.