Question

cos(x)+sin(x)tan(x)=1/cos(X)... solve as an identity?

Answer 1

sec(x)!=0 and X = 2 pi n-cos^(-1)(cos(x)) and n element Z
sec(x)!=0 and X = 2 pi n+cos^(-1)(cos(x)) and n element Z

Answer 2

im not sure i understand some of these terms... doesnt seem to be what i was looking for...