Question

помогите упростить 1+ sin α дробь 2 cos α + sin 2 α

Answer 1

$frac{1+sin alpha }{2cos alpha +sin2 alpha }= frac{1+sin alpha }{2cos alpha +2sin alpha cos alpha }= frac{1+sin alpha }{2cos alpha (1+sin alpha )}= frac{1}{2cos alpha }$