1
The order of operations doesn't matter since it's all division, so we can think of it as 1/(y/y). Since any number divided by itself is one, the y's effectively cancel each other out and it becomes 1/1 which can be further reduced to 1 by the same principle.
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y=1/sinxy'=(sinx*d/dx(1)-1*d/dx(sinx))/(sin2x)y'=(sinx*0-1(cosx))/(sin2x)y'=(-cosx)/(sin2x)y'=-(cosx/sinx)*(1/sinx)y'=-cotx*cscx
90/y
81
The expression is: y/6x
x=x-4/y 0=-4/y 0=-4 This equation is not well put together. I may have interpreted it wrong. This may be your equation and you didn't state that x-4 is a quantity x=(x-4)/y x-4=xy y=1-4/x y=-4x-1 + 1 This is slope intercept form. Your slope is -4/1 and your y-intercept is +1