sinx - cosx = 1/2 ise sin2x kaçtır?​

Sagot :

Sin^2x-2sinx.cosx +cos^2x=1/4
(Sin^2x+cos^2x=1)
(2sinx.cosx=Sin2x)
1-Sin2x=1/4
1-1/4=Sin2x
3/4=Sin2x