cosx = √(1 - sin^2 x)cosx = √(1 - (-3/5)^2)cosx = √(1 - 9/25)cosx = √(16/25)cosx = 4/5
tgx = sinx / cosxtgx = (-3/5) / (4/5)tgx = -3/4
ctgx = 1 / tgxctgx = 1 / (-3/4)ctgx = -4/3
Таким образом,cosx = 4/5,tgx = -3/4,ctgx = -4/3.
cosx = √(1 - sin^2 x)
cosx = √(1 - (-3/5)^2)
cosx = √(1 - 9/25)
cosx = √(16/25)
cosx = 4/5
tgx = sinx / cosx
tgx = (-3/5) / (4/5)
tgx = -3/4
ctgx = 1 / tgx
ctgx = 1 / (-3/4)
ctgx = -4/3
Таким образом,
cosx = 4/5,
tgx = -3/4,
ctgx = -4/3.