Radian Measure Radian measure Radians?are an alternative to degrees for measuring angles 1 radian is the angle in a sector of radius 1 and arc length 1 Radians are normally quoted in terms of π Thi...
Transformations of Trigonometric Functions Transformations of trigonometric functions You should already have a good idea about?translating,?stretching?and?reflecting?basic functions (see?Transform...
Graphs of Trigonometric Functions Graphs of trigonometric functions The Trigonometric Functions Sin, Cos and Tan all have special?periodic graphs?that you need to be able to sketch and remember You...
Non-Right-Angled Triangles What do I do if there isn’t a right?angle? The Sine Rule, Cosine Rule and Area Formula can be used for ANY type of triangle They can help us calculate missing side length...
Right-Angled Triangles What is SOHCAHTOA? SOH, CAH, and TOA are an easy way to remember the three basic trigonometry ratios They show the relationship between an angle and the different sides of a ...
Trigonometry - Definitions What is trigonometry? Trigonometry looks at the relationship between side lengths and angles of triangles It comes from the Greek words trigonon meaning ‘triangle’ and me...
Radius & Tangent What is the relationship between tangents and radii? A?tangent?is a line that?touches?a circle at a single point but doesn't cut across the circle A tangent to a circle is perp...
Angle in a Semicircle What is the angle in a semicircle property? It is always possible to draw a?unique?circle through the three vertices of a triangle – this is called the?circumcircle of the tri...
Bisection of Chords How can I find the equation of a perpendicular bisector? The?perpendicular bisector?of a line segment: is perpendicular to the line segment goes through the midpoint of the line...
Finding the Centre & Radius How can I find the centre and radius from any form of the equation of a circle? A circle equation in a different form can always be rearranged into?(x-?a)2?+?(y?-?b)...
Equation of a Circle What do I need to know about the equation of a circle? A circle with centre?(a,?b)?and radius?r?has the equation ?You need to be able to find the centre and radius of a circle ...
Modelling with Straight Lines What is modelling with straight lines? Modelling?means applying the mathematics to a?real-life?situation The model is used to?find?or?predict?future values Models will...
