25. Prove the following identities. Use proper form and show one step per line. tan (1-x) a) tan = 1-tan x 1+tan x
25. Prove the following identities. Use proper form and show one step per line. tan (1-x) a) tan = 1-tan x 1+tan x
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:25. Prove the following identities. Use proper form and show one step per line.
(1-x)
a) tan
=
b) 2 cos x csc x =
1-tan x
1+tan x
sin 2x
1-cos²x
Transcribed Image Text:c)
csc²x - 2
csc²x
= cos 2x
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