Question

синус50+косинус 320/2синус25*косинус 25

Answer 1

$frac{sin50+cos320}{2sin25*cos25} = frac{sin(90-40)+cos(360-40)}{sin50} =frac{cos40+cos40}{sin50}= frac{2cos40}{cos40}=2$

Answer 2

http://znanija.com/task/6899048