A-Level Maths Edexcel (9MA0)

Understand and use the definitions of sine, cosine and tangent for all arguments.

Use of $x$ and $y$ coordinates of points on the unit circle to give cosine and sine respectively.

The sine and cosine rules, including the ambiguous case of the sine rule.

The area of a triangle in the form $\frac{1}{2}ab\sin{C}$.

Work with radian measure, including use for arc length and area of sector.

Use of the formulae $s = rθ$ and $A = \frac{1}{2}r^2θ$ for arc lengths and areas of sectors of a circle.