Question

ctg2x(sinx-1)=0

cos2x/5 - 5sinx/5+2=0

Answer 1

ctg2x*(sinx-1)=0

2 случая

 

1) ctg2x=0

2x=pi/2+pik

x=pi/4+pik/2, k ∈Z

 

2) sinx=1

x=pi/2+2pik, k∈Z