Question

24 cos37° 30' (sin^2 37° 30`-cos^2 37° 30`)sin37° 30`

Answer 1

Все просто смотри
24cos37,30*sin37,30=12sin75
Sin^2 37.30-cos^2 37.30=-cos75
-6*2sin75cos75=-6*sin150=-6*1/2=-3

Answer 2

спасибо)))