Answer:
Divide by costheta
You get Sin(theta)/Cos(theta) + Cos(theta)/cos(theta) =0
[Sinx/cosx = tanx (a law of trigs)]
so the same as tan(theta) + 1=0
So tan(theta)=-1
Inverse tan/arctan (-1) =3/4 pi and (2pi - 3/4pi) = 7/4pi
Step-by-step explanation:
