The calculation gives 129.32 so the final 2 rounds down so that 129.3 is the answer.
53/10 is.
The two tens, nearest to 53, are 50 and 60. 53 is nearer to 50 (difference = 3) than it is to 60 (difference - 7). So 53, rounded to the nearest 10 is 50.
You can type sin(53 degrees) into Google and get your answer that way. Also, I happen to know that 53 degrees is very close to one of the angles of a 3,4,5 right triangle, so sin(53 degrees) is very close to 4/5.
50.
It is 53.
Zero.
53
It is already rounded to the nearest integer.
It is: 47 followed by 53
Sin(53 deg) = 0.7986, approx.
0