Question

5sin11x 4cos3x 3sin3x=0

Answer 1

5sin11x *  4cos3x * 3sin3x=0

 

sin11x=0

11x = pik

x = pik/11, k∈Z

 

cos3x = 0

3x = pi/2+pik

x= pi/6+pik/3, k∈Z

 

sin3x= 0

3x =pik

x= pik/3, k∈Z

Answer 2

sin11x=0 ; cos3x=0 ; sin3x=0

 

sin11x=0

11x=π*n

x1=πn/11

 

cos3x=0

3x=π/2+2πn

x2=π/6+2πn/3

 

sin3x=0

3x=πn

x3=πn/3

Ответ: πn/11 ; π/6+2πn/3 ; πn/3