Thread: Trigonometric problem

Hi, I couldnt solve to this question may you help me?


IF y = 5cos(x) + 3 then what is the heap of this equation?


(a) All real numbers
(b)  alpha<= y <= alpha
(c) -2 <= y <= 10
(d) -2 <= y <= 8

Thank you

Originally Posted by sunrise

Hi,
IF y = 5cos(x) + 3 then what is the heap of this equation?
(a) All real numbers
(b)  alpha<= y <= alpha
(c) -2 <= y <= 10
(d) -2 <= y <= 8

What does "the heap" mean?

pardon it did wrong

From your "candidate" answers, I suspect that "heap" is a mistranslation and that you are asking for the "range" of f(x)= 5 cos(x)+ 3. Since the range of cos(x) itself is -1 to 1, 5 cos(x)+ 3 can be any number from -5+ 3= -2 to 5+ 3= 8.

(If, in fact, you meant "domain", that is, of course, all real numbers.)

Thank you very much