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Different results for derivative of a function

Icebear 54
Posted 1 year ago

Hi! My friend asked me to help to check if the derrivative of equation 9 is like equation 10. I don't really how to solve it manually so I try to check from a couple of app and use software, but the result is different. Can you help me to check and explain if the derrivative is actually correct. enter image description here

I try with wolfram mathematica web :
enter image description here
enter image description here

wolfram mathematica software :
enter image description here

I also try to use derrivative calculator on internet (i change theta to x in this app) :
enter image description here
POSTED BY: Icebear 54
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Icebear 54
Icebear 54
Posted 1 year ago

Right, it seems like I misunderstood the text. Thank you for explaining it to me.
POSTED BY: Icebear 54
Icebear 54
Icebear 54
Posted 1 year ago

Thank you so much for the correction!

POSTED BY: Icebear 54

You misunderstand the text. Equation (9) defines a function TC. Equation (10) is not the derivative of TC. It is the value of theta that makes the derivative of TC equal to zero. Mariusz has shown that the result is correct.
POSTED BY: Gianluca Gorni

POSTED BY: Mariusz Iwaniuk
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