1) y = sinx
y = 0
sinx = 0
x = πk, k € Z
2) y = cosx
cosx = 0
x = π/2 + πk, k € Z
3) y = tgx
tgx = 0
4) y = ctgx
ctgx = 0
1) y = sinx
y = 0
sinx = 0
x = πk, k € Z
2) y = cosx
y = 0
cosx = 0
x = π/2 + πk, k € Z
3) y = tgx
y = 0
tgx = 0
x = πk, k € Z
4) y = ctgx
y = 0
ctgx = 0
x = π/2 + πk, k € Z