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Topics
Pre-Algebra
Mean
Mode
Greatest Common Factor
Least Common Multiple
Order of Operations
Fractions
Mixed Fractions
Prime Factorization
Exponents
Radicals
Algebra
Combine Like Terms
Solve for a Variable
Factor
Expand
Evaluate Fractions
Linear Equations
Quadratic Equations
Inequalities
Systems of Equations
Matrices
Trigonometry
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Solution Steps
\cos ( \pi )
cos
(
π
)
Get the value of \cos(\pi ) from trigonometric values table.
Get the value of
cos
(
π
)
from trigonometric values table.
-1
−
1
Factor
-1
−
1
Quiz
Trigonometry
5 problems similar to:
\cos ( \pi )
cos
(
π
)
Similar Problems from Web Search
How Find \cos{(\pi A)} if A is Orthogonal matrix
How Find
cos
(
π
A
)
if
A
is Orthogonal matrix
https://math.stackexchange.com/questions/605159/how-find-cos-pi-a-if-a-is-orthogonal-matrix
I'm afraid the equation \cos (\pi A) = E - 2A, \tag{1} where A is an orthogonal matrix, cannot hold, at least in the stated generality. To see a counterexample, consider the matrix J = \begin{bmatrix} 0 & -1 \\ 1 & 0 \end{bmatrix}, \tag{2} ...
I'm afraid the equation where
A
is an orthogonal matrix, cannot hold, at least in the stated generality. To see a counterexample, consider the matrix ...
What is \cos(\frac{\pi t}{2^n}) in terms of \cos(\pi t)?
What is
cos
(
2
n
π
t
)
in terms of
cos
(
π
t
)
?
https://math.stackexchange.com/q/2829065
Writing \cos(\pi t) in terms of \cos(\frac{\pi t}{2^n}) ... the same thing as writing \cos(2^n\theta) in terms of \cos(\theta) ... is a Chebyshev polynomial
Writing
cos
(
π
t
)
in terms of
cos
(
2
n
π
t
)
... the same thing as writing
cos
(
2
n
θ
)
in terms of
cos
(
θ
)
... is a Chebyshev polynomial
How do you evaluate \displaystyle{\cos{{3}}}\pi ?
How do you evaluate
cos
3
π
?
https://socratic.org/questions/how-do-you-evaluate-cos-3pi
Gió May 5, 2015 You can consider it visually as a graph and remember the periodicity of your \displaystyle{\cos} , meaning that it repeats itself at regular intervals (oscillating ...
Gió May 5, 2015 You can consider it visually as a graph and remember the periodicity of your
cos
, meaning that it repeats itself at regular intervals (oscillating ...
How do you find the exact value of \displaystyle{\cos{{5}}}\pi ?
How do you find the exact value of
cos
5
π
?
https://socratic.org/questions/how-do-you-find-the-exact-value-of-cos-5pi
1 Explanation: Unit circle --> \displaystyle{\cos{{\left({5}\pi\right)}}}={\cos{{\left(\pi+{4}\pi\right)}}}={\cos{\pi}}=-{1}
1 Explanation: Unit circle -->
cos
(
5
π
)
=
cos
(
π
+
4
π
)
=
cos
π
=
−
1
How do you evaluate \displaystyle{\cos{{8}}}{\left(\pi\right)} ?
How do you evaluate
cos
8
(
π
)
?
https://socratic.org/questions/how-do-you-evaluate-cos-8-pi
\displaystyle{1} Explanation: Notice that one complete rotation is \displaystyle{2}\pi : So \displaystyle{8}\pi is just 4 complete rotations. We therefore only need to find: \displaystyle{\cos{{\left({0}\right)}}} ...
1
Explanation: Notice that one complete rotation is
2
π
: So
8
π
is just 4 complete rotations. We therefore only need to find:
cos
(
0
)
...
What is \cos(k \pi)?
What is
cos
(
k
π
)
?
https://math.stackexchange.com/q/743511
The cosine of a integer times \pi is always \pm 1. It happens that when k is even, \cos{k\pi} = 1, when k is odd, \cos{k\pi}=-1 and therefor (-1)^k. The sine is always zero for every k. So ...
The cosine of a integer times
π
is always
±
1
. It happens that when k is even,
cos
k
π
= 1, when k is odd,
cos
k
π
=
−
1
and therefor
(
−
1
)
k
. The sine is always zero for every
k
. So ...
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Get the value of \cos(\pi ) from trigonometric values table.
Similar Problems
\cos ( \pi )
cos
(
π
)
\sin ( \frac { \pi } { 2 } )
sin
(
2
π
)
\tan ( \frac { 4 \pi } { 3 } )
tan
(
3
4
π
)
\csc ( 60 )
csc
(
6
0
)
\sec ( 180 )
sec
(
1
8
0
)
\cot ( \frac { 4 \pi } { 3 } )
cot
(
3
4
π
)
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