Skip to content

A NSW Government website

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 sec⁡θ, cosecθ and cot⁡θ 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 sec⁡θ, cosecθ and cot⁡θ 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 sec⁡θ=rx, cosecθ=ry and cot⁡θ=xy using a circle of radius r centred at the origin
  • Establish the reciprocal ratios sec⁡A=1cos⁡A, cosec⁡A=1sin⁡A, and cot⁡A=1tan⁡A, 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 tan⁡θ=sin⁡θcos⁡θ and cot⁡θ=cos⁡θsin⁡θ, identifying the angles to be excluded in each identity

  • Prove the complementary angle identities sin⁡(90°-θ)=cos⁡θ, cos⁡(90°-θ)=sin⁡θ, tan⁡(90°-θ)=cot⁡θ, cot⁡(90°-θ)=tan⁡θ, sec⁡(90°-θ)=cosec⁡θ and cosec⁡(90°-θ)=sec⁡θ 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 cos2⁡x+sin2⁡x=1, and the identities 1+tan2⁡x=sec2⁡x and 1+cot2⁡x=cosec2⁡x

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

Related files