The wave function

Topic Revision

Linear combinations of sin x and cos x

Notes from Leckie & Leckie's Success Guide.
Comparing coefficients

Notes from Leckie & Leckie's Success Guide.
Determining k and α

Notes from Leckie & Leckie's Success Guide.
The final form

Notes from Leckie & Leckie's Success Guide.

Past Paper Questions

Express in the form k sin (x+a) (Q9a P2 2023)
Express in the form k sin (x+a) (Q3a P2 2022)
Express in the form k cos (x+a) (Q6a P2 2019)
Express in the form k cos (x-a) (Q8a P2 2018)
Express in the form k sin (x-a) (Q14a P1 2017)
Express in the form k cos (x+a) (Q8a P2 2016)

Web Resources

Interactive Resources
- Wave Function (by DRT) Sum box almost off-screen at bottom
Online Calculators
- Writing y=acosx-bsinx as y=Rcos(x+a) (by Mark Willis)