Question

1)cos(29°) × sin(59°) – sin(31°) × sin(29°) 2)cosa=2/3;3П sinb=1/3;П/2

Answer 1

1)cos(29°) × sin(59°) = 0,7496954135
sin(31°) × sin(29°) = 0,2496954135
0,7496954135 – 0,2496954135 = 0,5
√1-2/3= $\frac{3}{3} - \frac{2}{3}$ =$\frac{1}{3}$=0.3
√1-1/3=$\frac{9}{9} - \frac{1}{9} = \frac{8}{9} = \frac{ \sqrt{8} }{3}$