Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 5 - No. 1)
In a triangle, if a = 6 cm, b = 8 cm, and angle A = 30°, how many possible triangles can be formed?
0
1
2
3
คำอธิบาย
Use the sine rule. SinB/b = sinA/a -> SinB = bsinA/a -> SinB = 8*sin30/6 = 2/3, which is possible.