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DerivativE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

+1 vote

Find dy/dx given y= cos^-1(4x+3)

derivatives

asked Feb 26, 2013 in CALCULUS by johnkelly Apprentice

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1 Answer

+1 vote

use the chain rule dcos^-1u/du.du/dx

where u=4x+3
dcos^-1u/du=-1/sqrt(1-u^2)
=-d/dx(4x+3)/sqrt(1-(4x+3)^2)
=-4/sqrt(1-(4x+3)^2)

answered Feb 28, 2013 by kevin Rookie

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