Not sure if you want to find the integral or the derivative. Please respond.
h'(x) generally stand for the derivative of function h(x).
[Integrals]
h(x)= -4 to sin(x) (cos(t^5)+t)dt
h'(x)=?
5 answers
Derivative.
By the definition of differentiation and integration, in general, if
I(x)=∫f(x)dx, then
I'(x)=f(x)
Can you take it from here?
I(x)=∫f(x)dx, then
I'(x)=f(x)
Can you take it from here?
Nope.
The question defines
h(x)=∫f(t)dt
where f(t)=cos(t^5)+t
and the limits of integration are from -4 to sin(x).
For experimentation, try f(t)=t;
h(x)=∫t;dt
=[t²/2]
to be evaluated between -4 and sin(x), which gives
h(x)=[sin²(x)/2 - (-4)²/2]
Now calculate h'(x) by the chain rule, namely for the first expression, differentiate with respect to sin(x), and then multiply by d(sin(x))/dx to get
h'(x)=2sin(x).cos(x)/2+0
=sin(x).cos(x)
You will notice that we have integrated t to get t²/2 and we differentiate sin²(x)/2 to get back sin(x).
What can you say about h'(x)?
If it is not clear, repeat the exercise using f(x)=cos(x), and see what you get for h'(x).
h(x)=∫f(t)dt
where f(t)=cos(t^5)+t
and the limits of integration are from -4 to sin(x).
For experimentation, try f(t)=t;
h(x)=∫t;dt
=[t²/2]
to be evaluated between -4 and sin(x), which gives
h(x)=[sin²(x)/2 - (-4)²/2]
Now calculate h'(x) by the chain rule, namely for the first expression, differentiate with respect to sin(x), and then multiply by d(sin(x))/dx to get
h'(x)=2sin(x).cos(x)/2+0
=sin(x).cos(x)
You will notice that we have integrated t to get t²/2 and we differentiate sin²(x)/2 to get back sin(x).
What can you say about h'(x)?
If it is not clear, repeat the exercise using f(x)=cos(x), and see what you get for h'(x).