Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
If
∣
a
∣
=
5
|\mathbf{a}| = 5
∣
a
∣
=
5
,
∣
b
∣
=
7
|\mathbf{b}| = 7
∣
b
∣
=
7
and the angle between them is
90
∘
90^\circ
9
0
∘
, then the value of
a
⋅
b
\mathbf{a}\cdot\mathbf{b}
a
⋅
b
is a)
35
35
35
b)
−
35
-35
−
35
c)
0
0
0
d)
12
12
12
Browse the problem library