Question

What does the graph of {sinx} look like ?
Here , { } denotes the fractional part of x .

Answer 1

You'll have to ask a better question. This one isn't making any sense.

Answer 2

Does this help ?

Answer 3

This is a graph of sin(x)

Answer 4

Yes . What is the graph of fractional part of sinx ?

Answer 5

http://mathworld.wolfram.com/FractionalPart.html

Answer 6

This: https://www.desmos.com/calculator/odluzwk4vo

Answer 7

Thanks :)
How do I judge it its nature myself ?

Answer 8

I mean how do I judge the concavity ?

Answer 9

I suggest using the idea of a function.

f(x) = sin(x)
Then make yourself an x|f(x) plot to see where some points fall