Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Problem
Problem
In a triangle
A
B
C
ABC
A
B
C
, if
cot
A
=
(
x
3
+
x
2
+
x
)
1
2
\cot A = (x^3 + x^2 + x)^{\frac{1}{2}}
cot
A
=
(
x
3
+
x
2
+
x
)
2
1
,
cot
B
=
(
x
+
x
−
1
+
1
)
1
2
\cot B = (x + x^{-1} + 1)^{\frac{1}{2}}
cot
B
=
(
x
+
x
−
1
+
1
)
2
1
and
cot
C
=
(
x
−
3
+
x
−
2
+
x
−
1
)
−
1
2
\cot C = (x^{-3} + x^{-2} + x^{-1})^{\frac{-1}{2}}
cot
C
=
(
x
−
3
+
x
−
2
+
x
−
1
)
2
−
1
, then the triangle is a. equilateral b. isosceles c. right angled d. obtuse angled
Browse the problem library