C.4.5—Trigonometry in physical problems

Use sin, cos and tan in physical problems, including resolving forces into components.

Use c.4.5—trigonometry in physical problems to connect the rule to the data and decision in the question.

This matters because c.4.5—trigonometry in physical problems determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply c.4.5—trigonometry in physical problems to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: C.4.5—Trigonometry in physical problems is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.