Odpowiedź:
a)
2sin30° + tg 45° + 3cos60° = 2 * 1/2 + 1 + 3 * 1/2 = 1 + 1 + 3/2 =
= 2 + 1,5 = 3,5
b)
sin60° * cos30° + sin45° * cos45° = √3/2 * √3/2 + √2/2 * √2/2 =
= 3/4 + 2/4 = 5/4 = 1 1/4
c)
ctg45° * cos60° - sin60° * tg60° = 1 * 1/2 - √3/2 * √3 = 1/2 - 3/2 =
= - 2/2 = - 1