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eigen/unsupported/doc/examples/MatrixSine.cpp
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2026-05-04 00:36:12 +00:00

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// SPDX-FileCopyrightText: The Eigen Authors
// SPDX-License-Identifier: MPL-2.0
#include <unsupported/Eigen/MatrixFunctions>
#include <iostream>
using namespace Eigen;
int main() {
MatrixXd A = MatrixXd::Random(3, 3);
std::cout << "A = \n" << A << "\n\n";
MatrixXd sinA = A.sin();
std::cout << "sin(A) = \n" << sinA << "\n\n";
MatrixXd cosA = A.cos();
std::cout << "cos(A) = \n" << cosA << "\n\n";
// The matrix functions satisfy sin^2(A) + cos^2(A) = I,
// like the scalar functions.
std::cout << "sin^2(A) + cos^2(A) = \n" << sinA * sinA + cosA * cosA << "\n\n";
}