Challenge Worksheet
TN-MATH-IELTS-86547 · v3.8
Cosine Ratio
IELTS · Math · Trigonometry · National Curriculum (UK)
Grade
IELTS
Subject
Math
Topic
Trigonometry
Subtopic
Cosine Ratio
Curriculum
National Curriculum (UK)
Difficulty
Higher
Time
35 minutes
Total marks
44
Student name
Teacher name
Date
Learning objectives
- Recognise cosine ratio accurately in math contexts.
- Explain the underlying rule of cosine ratio in the student's own words.
- Apply cosine ratio to multi-step and unfamiliar problems.
- Justify a chosen method and identify errors in another student's work.
Skills assessed
- Fluency and recall
- Method and setting out
- Reasoning and justification
- Problem solving in context
- Self-assessment
Instructions
- Write your name, your teacher's name and the date in the header.
- Answer every question in the space provided. Continue on the back if needed.
- Show all working — method marks are awarded even when the final answer is wrong.
- Aim to finish in about 35 minutes.
- Complete the reflection box at the end before you hand the sheet in.
Warm-up
Bloom: Remember · 3 marks
Answer quickly. These check you are ready for the topic.
1.Name one fact you already know about cosine ratio.
[1]2.Write down one fact you already know about cosine ratio.
[1]3.Circle one fact you already know about cosine ratio.
[1]
Recall
Bloom: Remember · 3 marks
Complete from memory. No calculator, no notes.
1.Label the key term used in cosine ratio described here: item 1.
[1]2.List the key term used in cosine ratio described here: item 2.
[1]3.Define the key term used in cosine ratio described here: item 3.
[1]