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HSC Mathematics Advanced trigonometric functions quiz

14 questions. Pick an answer and you'll see why right away. Options are shuffled each attempt, and the review at the end links each missed question to the dot point to revise.

  1. What is 5π6\frac{5\pi}{6} radians expressed in degrees?

  2. A sector of a circle has radius 6 cm and subtends an angle of π3\frac{\pi}{3} radians at the centre. What is the area of the sector?

  3. What is the exact value of cos⁡(2π3)\cos\left(\frac{2\pi}{3}\right)?

  4. What is the period of the function y=4sin⁡(3x)+2y = 4\sin(3x) + 2?

  5. The graph of y=2cos⁡(x−π4)+1y = 2\cos\left(x - \frac{\pi}{4}\right) + 1 has which features?

  6. If sin⁡θ=35\sin\theta = \frac{3}{5} and θ\theta is in quadrant 2, what is cos⁡θ\cos\theta?

  7. How many solutions does the equation 2sin⁡θ−1=02\sin\theta - 1 = 0 have for 0≤θ≤2π0 \leq \theta \leq 2\pi?

  8. Solve sin⁡2θ=sin⁡θ\sin 2\theta = \sin\theta for 0≤θ≤2π0 \leq \theta \leq 2\pi.

  9. Which expression equals sec⁡θ\sec\theta?

  10. The depth of water at a jetty is modelled by d(t)=5+2sin⁡(π6t)d(t) = 5 + 2\sin\left(\frac{\pi}{6}t\right) where dd is in metres and tt in hours after midnight. What is the maximum depth, and when does it first occur?

  11. Which of these is an equivalent form of cos⁡2θ\cos 2\theta?

  12. Simplify sin⁡2θ1−cos⁡θ\frac{\sin^2\theta}{1 - \cos\theta} for cos⁡θ≠1\cos\theta \neq 1.

  13. What is the range of y=3cos⁡(2x)−4y = 3\cos(2x) - 4?

  14. Solve tan⁡θ=−1\tan\theta = -1 for 0≤θ≤2π0 \leq \theta \leq 2\pi.

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