Finding Exact Trig Values

Finding Exact Trig Values worksheet

Suitable for Year groups: 9, 10

GCSE Tier:

Foundation/Higher

Targeting grades: 4-5

Prerequisite knowledge: Pythagoras' Theorem, Trigonometry (SOHCAHTOA), reading from graphs.

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This worksheet leads learners through finding the exact trigonometric ratios for 0, 30, 45, 60 and 90 degrees.

Section A introduces the concept of the unit circle and asks learners to estimate values from reading from the graph.

Section B then introduces the first of the special triangles that can help learners derive some of the values.

Sections C and D use the triangles and ask for tables of the ratios to be completed.

Section E then asks for all of the values to be summarised in a new table.