cosh x + sinh x = e* sinh(x + y) = sinh x cosh y + cosh x sinh y %3D cosh x – sinh x = e¯* cosh(x + y) = cosh x cosh y + sinh x sinh y cosh² x – sinh? x = 1 sinh(x – y) = sinh x cosh y – cosh x sinh y %3D 1 – tanh? x = sech² x cosh(x – y) = cosh x cosh y – sinh x sinh y coth? x – 1 = csch² x sinh 2x = 2 sinh x cosh x cosh(-x) = cosh x cosh 2x = cosh² x + sinh² x sinh(-x) = – sinh x cosh 2x = 2 sinh? x + 1 = 2 cosh? x – 1

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.4: Values Of The Trigonometric Functions
Problem 22E
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CAN YOU PROVE THAT : THE RIGHT SIDE = THE LEFT SIDE, PLEASE ?

cosh x + sinh x =
= e*
sinh(x + y) = sinh x cosh y + cosh x sinh y
cosh x – sinh x = e¯*
cosh(x + y) = cosh x cosh y + sinh.x sinh y
cosh? x – sinh? x = 1
1 – tanh? x = sech? x
coth? x – 1 = csch² x
sinh(x – y) = sinh x cosh y – cosh x sinh y
cosh(x – y) = cosh x cosh y – sinh.x sinh y
sinh 2x = 2 sinh x cosh x
cosh(-x) = cosh x
cosh 2x = cosh?x + sinh² .x
sinh(-x) = – sinh x
cosh 2x = 2 sinh² x + 1 = 2 cosh² x – 1
Transcribed Image Text:cosh x + sinh x = = e* sinh(x + y) = sinh x cosh y + cosh x sinh y cosh x – sinh x = e¯* cosh(x + y) = cosh x cosh y + sinh.x sinh y cosh? x – sinh? x = 1 1 – tanh? x = sech? x coth? x – 1 = csch² x sinh(x – y) = sinh x cosh y – cosh x sinh y cosh(x – y) = cosh x cosh y – sinh.x sinh y sinh 2x = 2 sinh x cosh x cosh(-x) = cosh x cosh 2x = cosh?x + sinh² .x sinh(-x) = – sinh x cosh 2x = 2 sinh² x + 1 = 2 cosh² x – 1
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