thanks!
-
First, to initiate the chain rule, do a u-substitution where u=sin(x)cos(x) and d(sqrt(u))/du=1/(2sqrt(u)):
This gives us d/dx [(sin(x)cos(x))/(2sqrt(sin(x)cos(x))].
Next use the product rule where u=cos(x) and v=sin(x):
This gives us (-sin(x)sin(x)+(cos(x))^2)/(2sqrt(sin(x)… and would be an acceptable answer to most teachers.
This can further be simplified to an alternate form (if you want) to [cos(2x)]/[(2sqrt(sin(x)cos(x))].
This gives us d/dx [(sin(x)cos(x))/(2sqrt(sin(x)cos(x))].
Next use the product rule where u=cos(x) and v=sin(x):
This gives us (-sin(x)sin(x)+(cos(x))^2)/(2sqrt(sin(x)… and would be an acceptable answer to most teachers.
This can further be simplified to an alternate form (if you want) to [cos(2x)]/[(2sqrt(sin(x)cos(x))].
-
d/dx (sinxcosx)^(1/2) = √(sinxcosx)
chain rule and product rule:
(1/2)[(sinxcosx)]^-(1/2) * [sinx*(-sinx) + cosx*(cosx)] =
(1/2)[(sinxcosx)]^-(1/2) * [-sin^2x + cos^2x] =
[-sin^2x + cos^2x] / 2√(sinxcosx)
chain rule and product rule:
(1/2)[(sinxcosx)]^-(1/2) * [sinx*(-sinx) + cosx*(cosx)] =
(1/2)[(sinxcosx)]^-(1/2) * [-sin^2x + cos^2x] =
[-sin^2x + cos^2x] / 2√(sinxcosx)
-
Chain Rule:
Sqrt(sinxcosx)
1/2(sinxcosx)^-1/2 *(sinx*-sinx + (cosx)^2) <---- product rule for the inside
1/2(1/sqrt(sinxcosx))*(-sin^2x + (cosx)^2)
Sqrt(sinxcosx)
1/2(sinxcosx)^-1/2 *(sinx*-sinx + (cosx)^2) <---- product rule for the inside
1/2(1/sqrt(sinxcosx))*(-sin^2x + (cosx)^2)