The independent variable of a function belongs to the domain or range?

The student will identity the domain, range, independent variable, or dependent variable in a given situation. in a relation, the input is the independent variable. Theoutput is the dependent variable, because the value of the output depends on the value of the input.

From the information, we know that:

sin(y°) = cos(x°)

We also have:

cos(x°) = sin(w°)

Therefore:

sin(y°) = sin(w°)

=> y = w

At this point we can already eliminate option b and d.

Finally, we know that:

∠CAB = ∠ECD (y = w)

∠ABC = ∠CDE ( = 90°)

=> ABC ~ CDE

The correct answer is A