13 12 x 2 3 July 8, 2019 16 32 64 128 13 12 x 3 2 4 6 13 12 * 3x if x 2 X 2 13 12 3x 13 2 3 x 12 1 6 Biết cosx =- 12 13 pi x 3pi 2 4 13 x 3 12 x 2 11 3 13 x 2 12 as a fraction 3x 8 12 x 2 )- 13 3 13 x 2 12 x 1 11 13 x 3 7 10 x 12 2 3 4 8x 12 )-( x 2 )=- 13
