Tanh x=3/5
Tanh 3x=?
a)63/65
b)61/65
c)65/61
d)65/63
Plz explain..
Tanh x=3/5
Tanh 3x=?
a)63/65
b)61/65
c)65/61
d)65/63
Plz explain..
Chilukuri Sai Kartik , 15 Years ago
Grade 12
Trigonometry> Hyperbolic functions...
1 Answers
Chetan Mandayam Nayakar
tanh x=(e^x-e^-x)/(e^x+e^-x)=(e^2x -1)/(e^x +1)=3/5,5(e^2x -1)=3(e^2x +1), 2e^2x =8, e^2x =4, e^x=2,tanh 3x=
(8-(1/8))/(8+(1/8))=63/65
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