Question

э.стсш9ющч7ыкшамрмджшшгвевее

Answer 1

sinα+cosα=1/2;  (sinα+cosα)²=(1/2)²;

2sinαcosα+cos²α=1+2sinαcosα=1/4;

 sinαcosα=1/4-1 /2 =-3/4/2 = -3/8