Answer 1

it's static ....
u can only use it's methods......

I haven't encountered a situation where I need an object of math class

to put it in another way. y. no one , even richest people wouldn't hire a mechanic in their house , in case their car broke down..........
because they can always call one and use their help .

u too can always call methods of math class and use them .........(no hiring /object creating is needed)