Reciprocal Trig Functions - Graphs What does the graph of the?sec?look like? The graph of?y?=?secx?looks like this: y-axis?is a?line of symmetry has?period?(ie repeats every)?360°?or?2π?radians ver...
Reciprocal Trig Functions - Definitions What are the reciprocal trigonometric functions? There are three reciprocal trig functions corresponding to the three regular trig functions Cotangent can al...
Small Angle Approximations Small angle approximations When an angle measured in?radians?is?very small,?you can?approximate?the value using?small angle approximations These?only?apply when angles ar...
Trigonometry Exact Values Exact values In trigonometry some values of sin, cos and tan are “nice” For example?sin 30° = ?,?tan 45° = 1 We can find those associated with the angles?30°,?45°?and?60°?...
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...
Strategy for Trigonometric Equations How to approach solving trig equations You can solve trig equations in a variety of different ways Sketching a graph?(see?Graphs of Trigonometric Functions) Usi...
Quadratic Trigonometric Equations Solving quadratic trigonometric equations If an equation involves sin2θ or cos2θ then it is a quadratic trigonometric equation These can be solved by factorising a...
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...
