What is the original function of the root sign SiNx

What is the original function of the root sign SiNx

It can be written as a variable upper bound integral to obtain a formal primitive function
∫[a,x] √(sint) dt
But √ (Sint) has no primitive function in elementary form, that is to say, its primitive function can't be written in the compound form of finite elementary functions, that is, it can't write the concrete expression

The operation of limit in Higher Mathematics
Limx → 3 / x power of 0 (x power of a + x power of B)
How to calculate the 9 / 2 power of the result AB?
What knowledge and skills are involved in this question? Is there any other knowledge that can be expanded?

This problem should be wrong copying, the following provides a general solution, with pictures. The picture has been passed on, just a moment. Click enlarge, and then click enlarge again

Limit calculation of advanced mathematics
limx－>1 sin(x-1)/x²-1

sin(x-1)/（x²-1）=sin(x-1)/[(x-1)(x+1)]
Because sin (x-1) / (x-1) is 1 when X - > 1
So the limit is 1 / 2

Computational limit of advanced mathematics
lim(2csc2t-cot t)
t→0
Homework all night and so on, brothers help ah

Is it 0