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ALPELGOLD
@ALPELGOLD
July 2022
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Тригонометрия!! Помогите !!
M(t)=M(0,8; -0,6)
Sin t =?
Tg t=?
cos t=?
ctg t=?
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Answers & Comments
sharadi
M(t)=M(0,8; -0,6) - IV четверть
Sin t =?
Tg t=?
cos t=?
ctg t=?
tgt = -0,6/0,8 = -3/4 = - 0,75
Сtgt = -4/3
1 + tg
²t = 1/Cos²t, ⇒1 + 9/16 = 1/Cos²t, ⇒25/16 = 1/Cos²t, ⇒Cos²t = 16/25,⇒
⇒Cost = 4/5 = 0,8
Sin
²t = 1 - Cos²t = 1 - 16/25 = 9/25, ⇒ Sint = -3/5 = -0,6
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Answers & Comments
Sin t =?
Tg t=?
cos t=?
ctg t=?
tgt = -0,6/0,8 = -3/4 = - 0,75
Сtgt = -4/3
1 + tg²t = 1/Cos²t, ⇒1 + 9/16 = 1/Cos²t, ⇒25/16 = 1/Cos²t, ⇒Cos²t = 16/25,⇒
⇒Cost = 4/5 = 0,8
Sin²t = 1 - Cos²t = 1 - 16/25 = 9/25, ⇒ Sint = -3/5 = -0,6