Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 24)
In a right triangle, if the hypotenuse is 10 and one angle is 30 degrees, what is the length of the side opposite the 30-degree angle?
3
5
7
8.66
توضیح
sin(30°) = opposite/10 -> opposite = 10*sin(30°) = 5