Помогите решить. По тригонометрии.

1) sin 60 + 2sin^2 15 = 2sin30*cos30 + 2sin^2 15= 2*1/2 *cos(2*15) + 2sin^2 15 =
cos^2 15 - sin^2 15 + 2 sin^2 15 = cos^2 15 + sin^2 15 =1.

2) √2/2 + (cos^2 pi/8 + 2sin pi/8 cos pi/8 + sin^2 pi/8) = √2/2 - [1 + sin(2*pi/8)] =
√2/2 - (1+sin pi/4) = √2/2 -1 - √2/2 = -1.