Question

Помогите решить: 9cosX=sinX

Answer 1

9*cos(x)=sin(x)

tg(x)=9

x=arctg(9)+pi*k

 

 

 

 

Answer 2

9cosx/cosx-sinx/cosx=9

9-tgx=0

tgx=9

x=arctgx9+пn