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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
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Systems of Equations
Matrices
Trigonometry
Simplify
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\cos ( \pi )
Get the value of \cos(\pi ) from trigonometric values table.
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Trigonometry
5 problems similar to:
\cos ( \pi )
Similar Problems from Web Search
How Find \cos{(\pi 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} ...
What is \cos(\frac{\pi t}{2^n}) in terms of \cos(\pi 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
How do you evaluate \displaystyle{\cos{{3}}}\pi ?
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 ...
How do you find the exact value of \displaystyle{\cos{{5}}}\pi ?
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}
How do you evaluate \displaystyle{\cos{{8}}}{\left(\pi\right)} ?
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)}}} ...
What is \cos(k \pi)?
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 ...
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Get the value of \cos(\pi ) from trigonometric values table.
Similar Problems
\cos ( \pi )
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