Sinus, kosinus, tangens va kotangens ta’riflari
Javoblar ota-onalar va o‘qituvchilar uchun.
1
sin(−π/2) va cos(−π/2) ni toping.
sin(−π/2) = −1, cos(−π/2) = 0
2
4 sin 30° + 2 cos 0° − 3 tg 45° ni hisoblang.
1
3
cos t = 1 tenglamani yeching.
t = 2πk, k ∈ Z
4
sin t = 1 tenglamani yeching.
t = π/2 + 2πk, k ∈ Z
5
sin α = −0,7 va cos α = 2 tengliklar mumkinmi? Tushuntiring.
sin α = −0,7 mumkin (−1 dan 1 gacha); cos α = 2 mumkin emas (2 > 1).