Double derivates

[heavy tulip]

What have u tried?

[cold niche]

I tried to use the quotient rule

[heavy tulip]

Can u show ur work on that?

[cold niche]

Yeah for sure

My teacher said me like 3 time is wrong

I used # and !

For dont write all the function

[heavy tulip]

Wow okay

Lemme check,give me a moment

[cold niche]

Ok, thank you

[cold niche]

Is because my teacher likes all in the same sheet

Sorry if its horrible

[heavy tulip]

Isnt this supposed to be sinx

[heavy tulip]

Nw

[heavy tulip]

This whole thing is f'(x)

[cold niche]

Yeah i know

Give me a second

This part

In the red square

Is the d/dx of rhe numerator f(x)

And y solved whit product rule

By parts

[heavy tulip]

Yeah got that

[cold niche]

And the cosx if i am not wrong

Is the derivate of sinx?

[heavy tulip]

It is

But f'(x) would still be the whole fraction and not js the numerator, in f'(x) we get sinx after derivative of cosx

[cold niche]

Ahhhhh

I see it

Thank you, I will try that

[heavy tulip]

Alr but dont close yet

Show ur work once u r done

[wise berry]

I remember that we get -sinx after derivate cosx

[heavy tulip]

There was a "-" b4 the "-sinx" in calculation

Thus it became sinx

[wise berry]

ah okay i see

[cold niche]

I will finish the exercise reparing that mistake

And i will send a gmail to my teacher

And if he say me is good

I close the chanel

[heavy tulip]

That might not be the only problem

[cold niche]

Probably

[heavy tulip]

It's a detailed calculation

I didnt check the rest

[cold niche]

Idk why he drop me to the fck wolfs after learning the basic things 😭🙏