#E1
Understand and use the definitions of sine, cosine and tangent for all arguments; the sine and cosine rules; the area of a triangle in the form .
Work with radian measure, including use for arc length and area of sector.
Trigonometric ratios Sine and cosine rules, area of a triangle Radians Arc length, area of a sector
#E2
Understand and use the standard small angle approximations of sine, cosine and tangent.
, , where is in radians.
#E3
Understand and use the sine, cosine and tangent functions; their graphs, symmetries and periodicity.
Know and use exact values of and for , , , , , and multiples thereof, and exact values of for , , , , and multiples thereof.
#E4
Understand and use the definitions of secant, cosecant and cotangent and of arcsin, arccos and arctan; their relationships to sine, cosine and tangent; understanding of their graphs; their ranges and domains.
Reciprocal trigonometric functions Inverse trigonometric functions
#E6
Understand and use double angle formulae; use of formulae for , and ; understand geometrical proofs of these formulae.
Understand and use expressions for in the equivalent forms of or .
#E7
Solve simple trigonometric equations in a given interval, including quadratic equations in , and and equations involving multiples of the unknown angle.
#E8
Construct proofs involving trigonometric functions and identities.
#E9
Use trigonometric functions to solve problems in context, including problems involving vectors, kinematics and forces.