Asked by Anonymous

What is the instantaneous rate of change at cos pi/4?

10 years ago

Answered by Anonymous

-1/root2

10 years ago

Answered by Reiny

for what function ??
if it is y = cosx
then dy/dx = -sinx
and -sin(π/4) = -1/√2

so you are correct if y =cosx

10 years ago

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