Question

senx/1+cosx=1-cosx/senx

Answer 1

${ \frac{senx}{1+cosx} = \frac{1-cosx}{senx} }\\\\\\{ \frac{senx}{1+cosx} \times \frac{1-cosx}{1-cosx} =}\\\\{ \frac{senx(1-cosx)}{1-cos^2x} =}\\\\{ \frac{senx(1-cosx)}{sen^2x} =}\\\\{\boxed {\frac{1-cosx}{senx}} \to \text{comprobada\ }\sqrt{}}\\\\{\mathbf{salu2.!!\ :)}}\\{\mathbf{Wellington}}$