Question:
Wybierz wszystkie wyrażenia, których wartość jest równa $1$.
Project ID:
7400320110
Answer 1:
$\sin 20^{\circ}-\sin 10^{\circ}$
Answer 1 Correct:
0
Answer 2:
$\sin 40^{\circ}-\mathrm{tg}\, 40^{\circ}$
Answer 2 Correct:
0
Answer 3:
$\cos^2 10^{\circ}+\cos^2 80^{\circ}$
Answer 3 Correct:
1
Answer 4:
$\frac12 \mathrm{tg}\, 45^{\circ}+\frac12 \mathrm{cotg}\, 45^{\circ}$
Answer 4 Correct:
1
Answer 5:
$\sin 30^{\circ}-\cos 30^{\circ}$
Answer 5 Correct:
0
Answer 6:
$\sin^2 50^{\circ}+\cos^2 50^{\circ}$
Answer 6 Correct:
1
Answer 7:
$\sin^2 30^{\circ}+\cos^2 45^{\circ}+\frac14 \mathrm{tg}\, 45^{\circ}$
Answer 7 Correct:
1
Answer 8:
$2\sin^2 30^{\circ}+2\cos^2 30^{\circ}$
Answer 8 Correct:
0