Sine for Edexcel A-level Maths
This page covers the following topics:
2. Values and applications
3. Right-angled traingles
4. Sine graphs and transformations
Sine of an angle is a ratio between the side opposite to the angle and the hypotenuse of a triangle.
Sine is one of three trigonometric functions of an angle.
sin(x) is calculated by calculating the ratio of two sides of a right-angled triangle, the opposite and the hypotenuse.
The diagram shows a sine graph.
Find the value of sin(A) by using the triangle shown.
Find sinB if b = 5 and c = 25.
1/5 or 0.2
Write down the coordinates of point A on the sine graph.
Use your calculator to find the value of sin(60º).
Which side of the triangle shown is the opposite?
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