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Hong Kong
Stage 4 - Stage 5

Graphical solution of trigonometric equations involving sine and cosine (radians)

Interactive practice questions

Consider the function $y=3\sin x$y=3sinx.


Graph this function.

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Add the line $y=3$y=3 to your graph.

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Hence, state all solutions to the equation $3\sin x=3$3sinx=3 over the domain $\left[-2\pi,2\pi\right]$[2π,2π]. Give your answers as exact values separated by commas.

Approx 3 minutes

Consider the function $y=3\cos x$y=3cosx.

Consider the function $y=\tan x$y=tanx.

Consider the function $y=\sin\left(\frac{x}{4}\right)$y=sin(x4).

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