GCSE MATHS REVISION
NOTES
Foundation & higher | exam focused
What You Need to Know
Trigonometry finds missing sides or angles in right-angled triangles.
Key Rules
Formula :
Sin = Opposite / Hypotenuse
Cos = Adjacent / Hypotenuse
Tan = Opposite / Adjacent
Rule 1: Substitute the values into the correct formula
Rule 2: Rearrange the equation to find the missing side length or angle size.
Worked Example
A simple worked example illustrating the key concepts.
NOTES
Foundation & higher | exam focused
What You Need to Know
Trigonometry finds missing sides or angles in right-angled triangles.
Key Rules
Formula :
Sin = Opposite / Hypotenuse
Cos = Adjacent / Hypotenuse
Tan = Opposite / Adjacent
Rule 1: Substitute the values into the correct formula
Rule 2: Rearrange the equation to find the missing side length or angle size.
Worked Example
A simple worked example illustrating the key concepts.
