Author note — to cover (Higher)

Higher only: the sine rule inverted to find angles, including the ambiguous case where the sine gives both an acute and an obtuse candidate and the diagram or context selects one. G22 requires knowing and applying the rule; sides are the sibling page. (G22)

• Fluency — direct questions on the sine rule for angles, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).