# Trigonometric problem

• Nov 11th 2012, 11:17 AM
sunrise
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
• Nov 11th 2012, 11:48 AM
Plato
Re: Trigonometric problem
Quote:

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?
• Nov 11th 2012, 12:05 PM
sunrise
Re: Trigonometric problem
pardon it did wrong
• Nov 11th 2012, 12:48 PM
HallsofIvy
Re: Trigonometric problem
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.)
• Nov 11th 2012, 12:51 PM
sunrise
Re: Trigonometric problem
Thank you very much