Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Determine the range of
y
=
cos
x
y=\cos x
y
=
cos
x
when
x
x
x
varies over
[
π
3
,
5
π
3
]
\left[\dfrac{\pi}{3},\dfrac{5\pi}{3}\right]
[
3
π
,
3
5
π
]
. a)
[
−
1
,
1
]
[-1,1]
[
−
1
,
1
]
b)
[
−
1
2
,
1
2
]
[-\dfrac{1}{2},\dfrac{1}{2}]
[
−
2
1
,
2
1
]
c)
[
−
1
,
1
2
]
[-1,\dfrac{1}{2}]
[
−
1
,
2
1
]
d)
[
0
,
1
2
]
[0,\dfrac{1}{2}]
[
0
,
2
1
]
Browse the problem library