1.

d/(dx){e^((1/2)log(1-Tanh^2x))+3^((1/2)log_(3)(coth^2x-1))}=

Answer»

`(-(sinh^3x+cosh^3x))/(cosh^2xsinh^2x)`
`(sinh^3x+cosh3x)/(cosh^2xsinh^2x)`
`(sinh^2x+cosh^2x)/(sinh^2xcosh^2x)`
`sech^2x cosh^2x`

ANSWER :A


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