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NSW Curriculum
NSW Education Standards Authority

11–12Mathematics Advanced 11–12 Syllabus (2024)

Implementation from 2026
Expand for detailed implementation advice

Content

Year 11

Trigonometric identities and equations
  • Define the trigonometric functions secθ, cosecθ and cotθ for acute angles θ using ratios of sides in a right-angled triangle
  • Find the exact secant, cosecant and cotangent ratios for angles of 30°, 45° and 60°
  • Justify the values of secθ, cosecθ and cotθ at 0° and 90° by examining the ratios of sides in a right-angled triangle as θ tends to 0° and 90°
  • Develop the definitions secθ=rx, cosecθ=ry and cotθ=xy using a circle of radius r centred at the origin
  • Establish the reciprocal ratios secA=1cosA, cosecA=1sinA, and cotA=1tanA, identifying the angles to be excluded in each identity

  • Determine the exact value of the secant, cosecant and cotangent ratios for angles that are integer multiples of π6 and π4, if they exist
  • Establish the identities tanθ=sinθcosθ and cotθ=cosθsinθ, identifying the angles to be excluded in each identity

  • Prove the complementary angle identities sin(90°-θ)=cosθ, cos(90°-θ)=sinθ, tan(90°-θ)=cotθ, cot(90°-θ)=tanθ, sec(90°-θ)=cosecθ and cosec(90°-θ)=secθ identifying the angles to be excluded in each identity
  • Evaluate trigonometric Loading  using angles of any Loading  and complementary angle identities

  • Solve Loading  involving Loading  of angles, specified in Loading  or Loading , on a restricted Loading 

  • Prove the Pythagorean identity cos2x+sin2x=1, and the identities 1+tan2x=sec2x and 1+cot2x=cosec2x

  • Apply trigonometric identities to solve problems, simplify expressions and prove further trigonometric identities using substitution and/or reduction to sinx and cosx
  • Solve problems involving trigonometric equations, including those that reduce to Loading , on a restricted domain

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