w that the straight lines whose direction cosines are giv vm² + wn² = 0 are parallel or perpendicular as a² 6² c² Oor ²6 2611 )=0
w that the straight lines whose direction cosines are giv vm² + wn² = 0 are parallel or perpendicular as a² 6² c² Oor ²6 2611 )=0
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Show that the straight lines whose direction cosines are given by the equations al + bm + cn = 0 and
ul² + vm² + wn² = 0 are parallel or perpendicular
a²
U
+
8²
V
+
c²
-= 0 or a²(v + w) + b²(w+u) + c²(u + v) = 0.
W
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