Write down the ratio of the sides represented by $\sin\theta$sinθ.
Write down the ratio represented by $\cos\theta$cosθ.
Write down the ratio represented by $\tan\theta$tanθ.
Write down the value of $\angle BAC$∠BAC in terms of $x$x.
review sine, cosine and tangent as ratios of side lengths in right-angled triangles