Please help with one easy question . . (1 Viewer)

[hon1hon2hon3]

HELP ! This question looks so easy but yet i cant do it, i know i am over compliccated it.

Defrentiate ln ( Sin^-1 x)

I remember got something to do with "u", i used u = Sin^-1 x and du/dx = 1 / square root 1 - x square. then i am stuck . . defrentiate ln x , you get 1/x . . soo is the answer just . . . square root 1 - x square . . ? dosent look right to me . . . ZOMG . . .:jaw:

 

[lyounamu]

HELP ! This question looks so easy but yet i cant do it, i know i am over compliccated it.

Defrentiate ln ( Sin^-1 x)

I remember got something to do with "u", i used u = Sin^-1 x and du/dx = 1 / square root 1 - x square. then i am stuck . . defrentiate ln x , you get 1/x . . soo is the answer just . . . square root 1 - x square . . ? dosent look right to me . . . ZOMG . . .:jaw:

y = ln (sin-1(x))
y' = 1/SQRT(1-x^2) . /sin-1(x))
= 1/SQRT(1-x^2)sin-1(x)

 

[hon1hon2hon3]

Zomg , i got that answer in the first place, and i was thinking , can u have sin^-1 in your answer . . then i thought no . . . . ZOMg . . thx soo much btw >_>

 

[tommykins]

回复: Re: Please help with one easy question . .

if y = ln f(x)
then dy/dx = f'(x)/f(x)