1) sint= -15/17 pi t 3pi/2 найти: cost, tgt, - вопрос №115173222128166030 от Levi1234 07.05.2021 20:31

Question

Алгебра: 1) sint= -15/17 pi t 3pi/2 найти: cost, tgt, ctgt 2) sin^2t + 1 = ? cos^2t

Levi1234 · Answer

Cost = - √(1 - Sin²t) = - √(1 - 225/289) = - √64/289 = - 8/17
tgt = Sint/Cost = - 15/17 : (- 8/17) = 15/8 = 1 7/8
ctgt = 1/tgt = 8/15
2) Sin²t/Cos²t + 1 = tg²t + 1 = (15/8)² + 1 = 225/64 + 1 = 289/64 = 4 33/64

1) sint= -15/17 pi< t < 3pi/2 найти: cost, tgt, ctgt 2) sin^2t + 1 = ? cos^2t