Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 3 - No. 13)
If the hypotenuse of a right triangle is 10 cm and one angle is 60 degrees, what is the length of the side opposite the 60-degree angle?
5 cm
8.66 cm
7.07 cm
10 cm
설명
Using sin(60°) = Opposite/10, Opposite = 10 * sin(60°) = 10 * (√3/2) ≈ 8.66 cm