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A ( k ) = ( 3 k 20000 ) + sin ( ( π 2 ) ( k 10000 ) 7 ) ( cos ( 41 π k 10000 ) ) 6 + ( 1 4 ) ( cos ( 41 π k 10000 ) ) 16 ( cos ( π k 20000 ) ) 12 sin ( 6 π k 10000 ) , {\displaystyle A(k)=\left({\frac {3k}{20000}}\right)+\sin \left(\left({\frac {\pi }{2}}\right)\left({\frac {k}{10000}}\right)^{7}\right)\left(\cos \left({\frac {41\pi k}{10000}}\right)\right)^{6}+\left({\frac {1}{4}}\right)\left(\cos \left({\frac {41\pi k}{10000}}\right)\right)^{16}\left(\cos \left({\frac {\pi k}{20000}}\right)\right)^{12}\sin \left({\frac {6\pi k}{10000}}\right),}
B ( k ) = − cos ( ( π 2 ) ( k 10000 ) 7 ) ( 1 + ( 3 2 ) ( cos ( π k 20000 ) cos ( 3 π k 20000 ) ) 6 ) ( cos ( 41 π k 10000 ) ) 6 + ( 1 2 ) ( cos ( 3 π k 100000 ) cos ( 9 π k 100000 ) cos ( 18 π k 100000 ) ) 10 , {\displaystyle B(k)=-\cos \left(\left({\frac {\pi }{2}}\right)\left({\frac {k}{10000}}\right)^{7}\right)\left(1+\left({\frac {3}{2}}\right)\left(\cos \left({\frac {\pi k}{20000}}\right)\cos \left({\frac {3\pi k}{20000}}\right)\right)^{6}\right)\left(\cos \left({\frac {41\pi k}{10000}}\right)\right)^{6}+\left({\frac {1}{2}}\right)\left(\cos \left({\frac {3\pi k}{100000}}\right)\cos \left({\frac {9\pi k}{100000}}\right)\cos \left({\frac {18\pi k}{100000}}\right)\right)^{10},}
R ( k ) = ( 1 50 ) + ( 1 10 ) ( sin ( 41 π k 10000 ) sin ( 9 π k 100000 ) ) 2 + ( 1 20 ) ( cos ( 41 π k 10000 ) ) 2 ( cos ( π k 20000 ) ) 10 . {\displaystyle R(k)=\left({\frac {1}{50}}\right)+\left({\frac {1}{10}}\right)\left(\sin \left({\frac {41\pi k}{10000}}\right)\sin \left({\frac {9\pi k}{100000}}\right)\right)^{2}+\left({\frac {1}{20}}\right)\left(\cos \left({\frac {41\pi k}{10000}}\right)\right)^{2}\left(\cos \left({\frac {\pi k}{20000}}\right)\right)^{10}.}
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