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Mathematics 18 Online
OpenStudy (anonymous):

how find the derivative of f(x)=sin(x)^x ?!

OpenStudy (anonymous):

\[ f(x)=\sin(x)^x \]

OpenStudy (anonymous):

\[x \epsilon (0,\pi)\]

hartnn (hartnn):

start by taking log on both sides log f(x) =.....

OpenStudy (anonymous):

Please ln both sides

OpenStudy (anonymous):

you should get lnf(x)=xln(sinx)

OpenStudy (ikram002p):

y= sinx^x as hartnn said take log for both log y= x log x nw deff both side for x , then but insted of y ,sinx ^x

OpenStudy (anonymous):

f(x)=e^(xln(sinx))

OpenStudy (anonymous):

use e's derivative and you should get an answer for dy/dx

OpenStudy (anonymous):

is the answer is like this @shakesworde

hartnn (hartnn):

YES, thats correct that can also be simplified one step further, if required.

OpenStudy (anonymous):

how ?! to simplify @hartnn ?!

hartnn (hartnn):

for one thing, cos x/ sin x = cot x but the 1st term, e^(xln sin x ) can be simplified using the fact that e^ln A = A as sin x^x

OpenStudy (anonymous):

i see, thanks @ hartnn

hartnn (hartnn):

welcome ^_^

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