A Level Trigonometry Common Mistakes 2026: Errors Students Often Make and How to Avoid Them
A Level trigonometry common mistakes usually come from avoidable execution errors, not a lack of knowledge. The biggest ones are incorrect calculator settings (radians vs degrees), failing to list all solutions within a required range using the CAST diagram and principal values, and misapplying trigonometric identities (especially compound angles and inverse notation). Students also lose marks through weak algebraic manipulation … Read more