Which function has a domain of all real numbers?
y = sinx
y = cotx
y = tanx
y = secx

The answer is (A) y = sinx.

Step-by-step explanation: We are given to select the correct function from the options that has a domain of all real numbers.

We know that only some function and cos function has a domain of all real numbers.

Thus, out of the given options, only the since function has a domain and range of

The domain of the other three functions are different from some function.

Thus, the correct option is (A) y = sinx.

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

70.30

step-by-step explanation: