Trigonometric Functions (Edexcel A-Level Mathematics): Flashcards

Vertical Stretching/Compressing alters amplitude.

$|A| > 1$ causes vertical stretching in the graph.

The graph is compressed vertically.

It reflects the graph across the $x$-axis.

Horizontal Stretching/Compressing alters the period.

Period is $360°/|B|$ or $2\pi/|B|$.

Add $C$ to the function: $y = \sin(x) + C$.

$C > 0$ shifts the graph up.

$D > 0$ shifts the graph to the right.

The graph reflects across the $y$-axis.