Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
csc
18
∘
\csc 18^\circ
csc
1
8
∘
is a root of the equation (a)
x
2
+
2
x
−
4
=
0
x^2 + 2x - 4 = 0
x
2
+
2
x
−
4
=
0
(b)
4
x
2
+
2
x
−
1
=
0
4x^2 + 2x - 1 = 0
4
x
2
+
2
x
−
1
=
0
(c)
x
2
−
2
x
−
4
=
0
x^2 - 2x - 4 = 0
x
2
−
2
x
−
4
=
0
(d)
x
2
−
2
x
+
4
=
0
x^2 - 2x + 4 = 0
x
2
−
2
x
+
4
=
0
Browse the problem library