Checkpoint 1
Checkpoint 1 — Trigonometry
Covers: Right-angled triangles, SOH CAH TOA, trig ratios, Pythagorean identity, solving triangles, angles of elevation and depression
Checkpoint 1
Test your understanding of Lessons 1-5
1 In a right-angled triangle, the hypotenuse is opposite the:
2 $\sin 30° = $
3 If $\sin \theta = 3/5$, then $\cos \theta = $
4 To find an unknown angle given opposite and hypotenuse, use:
5 From a 50 m cliff, the angle of depression to a boat is $20°$. The boat is approximately:
6 $\sin^{-1}(0.5) = $
7 $\tan 45° = $
8 Angle of elevation equals angle of depression because they are: