Geometry & MeasuresKey Facts

The Values You MUST Know

Part of Exact Trig Values · GCSE GCSE Mathematics revision

This key facts covers The Values You MUST Know within Exact Trig Values for GCSE Mathematics. Revise Exact Trig Values in Geometry & Measures for GCSE Mathematics with 14 exam-style questions and 4 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 2 of 7 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 7

Practice

14 questions

Recall

4 flashcards

The Values You MUST Know

Angle	sin	cos	tan
0°	0	1	0
30°	1/2	√3/2	1/√3 = √3/3
45°	1/√2 = √2/2	1/√2 = √2/2	1
60°	√3/2	1/2	√3
90°	1	0	undefined

Keep building this topic

Read this section alongside the surrounding pages in Exact Trig Values. That gives you the full topic sequence instead of a single isolated revision point.

The Special Triangles Memory Tricks Worked Example 1 Worked Example 2

Practice Questions for Exact Trig Values

What is the exact value of sin 30°?

A. √3/2
B. 1/2
C. √2/2
D. 1

1 markfoundation

James says that sin 30° and cos 60° are equal. Is James correct? Explain your answer using exact values.

2 marksstandard

Quick Recall Flashcards

Cos Pattern

Cos is sin BACKWARDS. cos θ = sin(90°-θ). So cos 30° = sin 60°, etc.

Sin Pattern

sin 0°=0, sin 30°=1/2, sin 45°=√2/2, sin 60°=√3/2, sin 90°=1. Pattern: √n/2 for n=0,1,2,3,4

14 questions on Exact Trig Values — practise free

Instant marking, adaptive difficulty, and 4 spaced repetition flashcards. Free until your GCSEs.

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The Special Triangles

Memory Tricks