9. Dave was simplifying a trig expression using the following steps: tan x1+cot² x tan x csc? Step #1 cot x1+ tanx cot x sec? x Step #2 tan x cos? %3D cot x sin? x cos x Step #3 %3D sin? Step #4 cot x %3D Dave made his first error in step #

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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9.
Dave was simplifying a trig expression using the following steps:
tan x
1+ cot? x
tan x csc? xr
Step #1
cotx1+ tan²x
cot x sec? x
Step #2
tan x
cos x
cot x sin? x
cos?
(1
sin? x
Step #3
Step #4
cot x
Dave made his first error in step #.
Transcribed Image Text:9. Dave was simplifying a trig expression using the following steps: tan x 1+ cot? x tan x csc? xr Step #1 cotx1+ tan²x cot x sec? x Step #2 tan x cos x cot x sin? x cos? (1 sin? x Step #3 Step #4 cot x Dave made his first error in step #.
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