3 1 2 2 75 July 8, 2019 16 32 64 128 3 x 1 2 * 3 x 2 75 3 1 2 x 2 75 25 Cos 75 3 1 2 2 Sin 75 3 1 2 2 Prove cos 75 3 1 2 2 75 x 3 2 1 2 x 20 ) 1 3x 3 2 2 0 75 Cos 75 √ 3 1 2 √ 2 3 sin 2 15 1 3 sin 2 75 2 3 of 1 2 5 of 75 of 540 1 2 3 2x0 75 2 3 Sin 75 √ 3 1 2 √ 2 2 1 3 7 8 x 2 75
