Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 44)
If the angle of elevation is 30 degrees, what is the approximate ratio between the opposite side and the adjacent side?
0.5
0.7
1
1.7
설명
tan(30°) ≈ 0.577, which is close to 0.5.