Question:
A stretched string, $20\,\mathrm{m}$ long, at the end of which a kite is attached, makes anangle of $70$ degrees with the horizontal plane. Mark all the expressions that represent the height of the kite above the ground:
Project ID:
7400220113
Answer 1:
$20\cdot \mathrm{tg}\, 20 ^{\circ}$
Answer 1 Correct:
0
Answer 2:
$20\cdot \mathrm{tg}\, 70 ^{\circ}$
Answer 2 Correct:
0
Answer 3:
$20\cdot \sin 70 ^{\circ}$
Answer 3 Correct:
1
Answer 4:
$20\cdot \cos 20 ^{\circ}$
Answer 4 Correct:
1
Answer 5:
$20^2 − (20\cdot \cos 70 ^{\circ})^2$
Answer 5 Correct:
0
Answer 6:
$20\cdot \mathrm{tg}\, 70 ^{\circ}\cdot \cos 70 ^{\circ}$
Answer 6 Correct:
1
Answer 7 Correct:
0
Answer 8 Correct:
0