Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 28)
When using the sine rule to solve for an angle in a triangle, what is important to consider?
The ambiguous case
The angle can be acute or obtuse
The largest angle must be considered
There is only one possible solution
Giải thích
When using the sine rule, the possibility of two solutions needs to be checked, particularly for angles.