If the cos 23° = two thirds, then the sin 67° = . two thirds, because the angles are complementary one half, because the angles are complementary three halves, because the angles are supplementary 1, because the angles are complementary

Below.

Step-by-step explanation:

sin 67 = two thirds because the angles are complementary.

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.