Which expression is equal to sin 75°?
o sin 135º cos 60° - cos 135º sin 60°
o cos 135º cos 60° + sin 135º sin 60°
e sin 135º cos 60° + cos 135º sin 60°
cos 135º cos 60° – cos 135º cos 60'

it's sin 135 cos 60- cos 135sin60

the first answer is correct!

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.