25 1 5 2x 4 July 8, 2019 16 32 64 128 25 cos 2x 4 * 5 cos2x 1 25 1 2x 5 )( 4x 6 25 x 5 1 2x 40 25 x 4 =( 1 5 2x 25 - 5 4
