P1.3.3 - Trigonometric functions and graphs

Understand sine, cosine and tangent functions, including their graphs, symmetries and periodicity; sketch transformations such as y = 3 sin x, y = sin(x + π/6) and y = sin 2x.

Use trigonometric functions and graphs to connect the rule to the data and decision in the question.

This matters because trigonometric functions and graphs determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply trigonometric functions and graphs to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Trigonometric functions and graphs is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.