Differentiate with respect to $y$: $f(x,y,z) = sin(x)sin(y)sin(z)-cos(x)cos(y)cos(z)$












-3












$begingroup$


The derivative with respect to $y$ of



$$f(x,y,z) = sin(x)sin(y)sin(z)-cos(x)cos(y)cos(z)$$



is



a) $f’(x,y,z) = cos(x)cos(y)sin(z) + sin(x)sin(y)cos(z)$



b) $f’(x,y,z) = sin(x)cos(y)sin(z) + cos(x)sin(y)cos(z)$



c) $f’(x,y,z) = cos(x)cos(y)cos(z) + sin(x)sin(y)sin(z)$



d) $f’(x,y,z) = sin(x)sin(y)sin(z) + cos(x)cos(y)cos(z)$










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    $begingroup$
    What are your thoughts? What have you tried? Where did you get stuck? Questions that just state a problem are likely to be downvoted and closed.
    $endgroup$
    – postmortes
    Jan 15 at 12:04
















-3












$begingroup$


The derivative with respect to $y$ of



$$f(x,y,z) = sin(x)sin(y)sin(z)-cos(x)cos(y)cos(z)$$



is



a) $f’(x,y,z) = cos(x)cos(y)sin(z) + sin(x)sin(y)cos(z)$



b) $f’(x,y,z) = sin(x)cos(y)sin(z) + cos(x)sin(y)cos(z)$



c) $f’(x,y,z) = cos(x)cos(y)cos(z) + sin(x)sin(y)sin(z)$



d) $f’(x,y,z) = sin(x)sin(y)sin(z) + cos(x)cos(y)cos(z)$










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  • 1




    $begingroup$
    What are your thoughts? What have you tried? Where did you get stuck? Questions that just state a problem are likely to be downvoted and closed.
    $endgroup$
    – postmortes
    Jan 15 at 12:04














-3












-3








-3





$begingroup$


The derivative with respect to $y$ of



$$f(x,y,z) = sin(x)sin(y)sin(z)-cos(x)cos(y)cos(z)$$



is



a) $f’(x,y,z) = cos(x)cos(y)sin(z) + sin(x)sin(y)cos(z)$



b) $f’(x,y,z) = sin(x)cos(y)sin(z) + cos(x)sin(y)cos(z)$



c) $f’(x,y,z) = cos(x)cos(y)cos(z) + sin(x)sin(y)sin(z)$



d) $f’(x,y,z) = sin(x)sin(y)sin(z) + cos(x)cos(y)cos(z)$










share|cite|improve this question











$endgroup$




The derivative with respect to $y$ of



$$f(x,y,z) = sin(x)sin(y)sin(z)-cos(x)cos(y)cos(z)$$



is



a) $f’(x,y,z) = cos(x)cos(y)sin(z) + sin(x)sin(y)cos(z)$



b) $f’(x,y,z) = sin(x)cos(y)sin(z) + cos(x)sin(y)cos(z)$



c) $f’(x,y,z) = cos(x)cos(y)cos(z) + sin(x)sin(y)sin(z)$



d) $f’(x,y,z) = sin(x)sin(y)sin(z) + cos(x)cos(y)cos(z)$







trigonometry






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edited Jan 15 at 13:53









Blue

48.5k870154




48.5k870154










asked Jan 15 at 11:39









JohnJohn

1




1








  • 1




    $begingroup$
    What are your thoughts? What have you tried? Where did you get stuck? Questions that just state a problem are likely to be downvoted and closed.
    $endgroup$
    – postmortes
    Jan 15 at 12:04














  • 1




    $begingroup$
    What are your thoughts? What have you tried? Where did you get stuck? Questions that just state a problem are likely to be downvoted and closed.
    $endgroup$
    – postmortes
    Jan 15 at 12:04








1




1




$begingroup$
What are your thoughts? What have you tried? Where did you get stuck? Questions that just state a problem are likely to be downvoted and closed.
$endgroup$
– postmortes
Jan 15 at 12:04




$begingroup$
What are your thoughts? What have you tried? Where did you get stuck? Questions that just state a problem are likely to be downvoted and closed.
$endgroup$
– postmortes
Jan 15 at 12:04










1 Answer
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$begingroup$

If we differentiate with respect to $y$ the other variables are assumed to be constant, so we get
$$frac{partial f(x,y,z)}{partial y}=cos(y)sin(x)sin(z)+sin(y)cos(x)cos(z)$$






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    $begingroup$

    If we differentiate with respect to $y$ the other variables are assumed to be constant, so we get
    $$frac{partial f(x,y,z)}{partial y}=cos(y)sin(x)sin(z)+sin(y)cos(x)cos(z)$$






    share|cite|improve this answer









    $endgroup$


















      1












      $begingroup$

      If we differentiate with respect to $y$ the other variables are assumed to be constant, so we get
      $$frac{partial f(x,y,z)}{partial y}=cos(y)sin(x)sin(z)+sin(y)cos(x)cos(z)$$






      share|cite|improve this answer









      $endgroup$
















        1












        1








        1





        $begingroup$

        If we differentiate with respect to $y$ the other variables are assumed to be constant, so we get
        $$frac{partial f(x,y,z)}{partial y}=cos(y)sin(x)sin(z)+sin(y)cos(x)cos(z)$$






        share|cite|improve this answer









        $endgroup$



        If we differentiate with respect to $y$ the other variables are assumed to be constant, so we get
        $$frac{partial f(x,y,z)}{partial y}=cos(y)sin(x)sin(z)+sin(y)cos(x)cos(z)$$







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered Jan 15 at 11:45









        Dr. Sonnhard GraubnerDr. Sonnhard Graubner

        75.7k42866




        75.7k42866






























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