Sin^2x - 2sinx + 1 = 0

90, 270 degrees

Step-by-step explanation:

sin(x) = a

a^2 - 2a + 1 = 0

(a-1)^2 = 0

1 = a

So...

1 = sin(x)

90, 270 = x

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076