A traveling wave. A snapshot (frozen in time) of a water wave is described by the function z = 1 + sin(x – y), where z gives the height of the wave and (x, y) are the coordinates in the horizontal plane z=0. a. Use a graphing utility to graph z = 1+ sin(x- y) b. The crests and the troughs of the waves are aligned in the direction in which the height function has zero change. Find the direction in which the crests and troughs are aligned. C. If you were surfing on this wave and wanted the steepest descent from a crest to a trough, in which direction would you point your surfboard (given in terms of a unit vector in the xy-plane)?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 40E
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6. A traveling wave. A snapshot (frozen in time) of a water wave is described by the function z = 1+
sin(x – y), where z gives the height of the wave and (x, y) are the coordinates in the horizontal plane
Z=0.
a. Use a graphing utility to graph z = 1 + sin(x – y)
b. The crests and the troughs of the waves are aligned in the direction in which the height
function has zero change. Find the direction in which the crests and troughs are aligned.
C. If you were surfing on this wave and wanted the steepest descent from a crest to a trough, in
which direction would you point your surfboard (given in terms of a unit vector in the
xy-plane)?
d. Check that your answers to parts (b) and (c) are consistent with the graph of part (a).
Transcribed Image Text:6. A traveling wave. A snapshot (frozen in time) of a water wave is described by the function z = 1+ sin(x – y), where z gives the height of the wave and (x, y) are the coordinates in the horizontal plane Z=0. a. Use a graphing utility to graph z = 1 + sin(x – y) b. The crests and the troughs of the waves are aligned in the direction in which the height function has zero change. Find the direction in which the crests and troughs are aligned. C. If you were surfing on this wave and wanted the steepest descent from a crest to a trough, in which direction would you point your surfboard (given in terms of a unit vector in the xy-plane)? d. Check that your answers to parts (b) and (c) are consistent with the graph of part (a).
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