Question

укажите несколько значение b,при которых:
a)sin b=-1
b)cos b=1
c)cos b=0
d)ctg b=0

Answer 1

a)sin b=-1
b=-π/2+2πn,n∈z
b={-π/2;-3π/2;3π/2}
b)cos b=1
b=2πn,n∈z
b={0;2π;-2π}
c)cos b=0
b=π/2+πn,n∈z
b={π/2;3π/2;-π/2}
d)ctg b=0
b=π/2+πn,n∈z
b={π/2;3π/2;-π/2}