#include using namespace Eigen; int main() { MatrixXd A = MatrixXd::Random(3,3); std::cout << "A = \n" << A << "\n\n"; MatrixXd sinA; ei_matrix_sin(A, &sinA); std::cout << "sin(A) = \n" << sinA << "\n\n"; MatrixXd cosA; ei_matrix_cos(A, &cosA); 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"; }