find the derivative of x/(1+xtanx)
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y=x/(1+xtanx)
defferentiate
dy/dx={(1+xtanx) dx/dx-xd (1+xtanx)}/(1+xtanx)^2
={(1+xtanx)-x (tanx+xsec^2x)}/(1+xtanx)^2
=(1-x^2sec^2x)/(1+xtanx)^2
defferentiate
dy/dx={(1+xtanx) dx/dx-xd (1+xtanx)}/(1+xtanx)^2
={(1+xtanx)-x (tanx+xsec^2x)}/(1+xtanx)^2
=(1-x^2sec^2x)/(1+xtanx)^2
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