(3) When the graph of a sinusoidal function involves both horizontal scaling and horizontal shifting there are two possibilities: sin (m(x – k)) and y = sin (mr – k')). - In words: we can doing the shifting first and then the scaling, or vice versa. Note that if these graphs are to be the same we must have k' = mk.

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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(3) When the graph of a sinusoidal function involves both horizontal
scaling and horizontal shifting there are two possibilities:
y = sin (m(x – k)) and
sin (mx – k')).
In words: we can doing the shifting first and then the scaling,
or vice versa. Note that if these graphs are to be the same we
must have k = mk.
!!
In one of these the shift amount is the actual distance the
graph is shifted. In the other the shift amount is known as a
phase angle - it gives the shift as a fraction of a full rotation.
Have each member of your group create a graph
the same
graph!
in both forms. In other words everybody choose a
random horizontal scaling factor and a random shift amount
and plot it in the two forms above. Discuss the evidence you
obtain and determine which form is the phase angle version and
which is the true horizontal shift version.
Transcribed Image Text:(3) When the graph of a sinusoidal function involves both horizontal scaling and horizontal shifting there are two possibilities: y = sin (m(x – k)) and sin (mx – k')). In words: we can doing the shifting first and then the scaling, or vice versa. Note that if these graphs are to be the same we must have k = mk. !! In one of these the shift amount is the actual distance the graph is shifted. In the other the shift amount is known as a phase angle - it gives the shift as a fraction of a full rotation. Have each member of your group create a graph the same graph! in both forms. In other words everybody choose a random horizontal scaling factor and a random shift amount and plot it in the two forms above. Discuss the evidence you obtain and determine which form is the phase angle version and which is the true horizontal shift version.
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