Linear Trigonometric Equations Solving linear trigonometric equations You should have already seen two ways to solve linear trig equations By?sketching the graph?(see Graphs of Trigonometric Functi...
A-level Biology（生物）位列羅素聯盟“ facilitating subjects”，是一個很受大學歡迎的A-level科目，大學課程選擇和職業選擇面很廣。 大多數醫學、生物、生物醫學科科學、牙科、營養學、物理療法、視覺矯正、獸醫...
Trigonometry - Simple Identities What is a trigonometric identity? Trigonometric identities are statements that are true for all values of?x?or theta (θ) They are used to help simplify trig equatio...
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...
Modelling with Sequences & Series What do I need to know about modelling with sequences and series? Many real-life situations can be modelled using sequences and series If a quantity is changin...
Recurrence Relations What do I need to know about recurrence relations? A?recurrence relation?describes each term in a sequence as a function of the previous term – ie?un+1?= f(un) Along with the f...
Sigma Notation What is sigma notation? The symbol Σ is the capital Greek letter sigma – that's why it's called 'sigma notation'! 'Σ' stands for 'sum' – the expression to the right of the Σ tells yo...
Language of Sequences & Series What is a sequence? A?sequence?is an?ordered?set of numbers with a rule for finding all the numbers in the sequence The numbers in a sequence are called?terms The...
