Case study·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A teacher compares two solutions in Trigonometric Ratios in Right Triangles. Solution I uses the condition first; Solution II jumps directly to a formula.
Total: 4 marks
(a) Which solution is more reliable and why? (1 mark)
(b) Write the correct first move. (1 mark)
(c) State the likely error in Solution II. (2 marks)
Something wrong with this item?