math/ calculus
posted by Angie
given h(x)= cotx/x find h'(ð/2)

Reiny
h'(x) = (x(csc^2 x)  cotx)/x^2
then h'(π/2) = ((π/2)(1)  0)/(π^2 /4)
= (π/2) / (π^2/4) = 2/π
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