Determine the domain of y = 4 cos X?

Answer 1

The domain of the function is the possible set of values of x for which you can get a value of y. In this problem, all values of x gives corresponding values of y. So the domain is positive infinity to negative infinity or simply the set of all real numbers R.
So, domain = R

Range is possible values of y,
range = -4 to +4

Answer 2

The domain is answered by the question:
What values of x can I plug in and have a valid answer?
Answer: from negative infinity to positive infinity

The range is how far the y value will go depending on what you have for the domain. For the domain of all real x values, the range will be from -4 to 4.

Answer 3

The area of four cos x is an same because the area of cos x. The area is the set of all factors (frequently durations for trig) the position the function is defined. to discover the area, ask your self is there any factor interior the actual numbers the position cos isn't defined? imagine about the definition of cos. Adj/Hyp. on account that it is a complication-free ratio, the purely time that's absolutely not defined is for Hyp = 0. there is not any factor on the unit circle for which the hypotenuse is 0, hence no factor on the unit circle for which cos would not exist, and hence no factor interior the actual numbers the position cos would not exist (on account that they're all repeats of the unit circle). This consequences interior the acceptable that the area of cos x is all genuine numbers.

Answer 4

-infinity to +infinity