Question

Simplify cos(x-y)+cos(x+y)/cosx

Answer 1

\[\frac{ \cos(x-y)+\cos(x+y) }{ cosx }\] is that u mean?

Answer 2

\[\frac{ \cos(x-y)+\cos(x+y) }{ cos x }\]
\[\frac{ (cos x cos y+sin x sin y)+(cos x cos y-sin x sin y) }{ cos x }\]
\[\frac{ 2cosxcosy }{ cos x }\]
\[2\cos y\]