cosx+sin(pi/2-x)+cos(pi-x)=0

Question

cosx+sin(pi/2-x)+cos(pi-x)=0

Answer 1

cosx+cosx-cosx=0

cosx=0

x= pi/2+pik

Answer 2

cosx+sin(pi/2-x)+cos(pi-x)=0

 

cosx + cosx - cosx = 0

 

cosx = 0

 

x= pi/2+pik, k∈Z