hi guys , i am a high school student , and i have a trigonometry test tomorrow . i would appreciate every help from you.
for now i can't solve these trigonometry equations.
they are mashing up my mind
1) sin2x + sinx * cosx = 1
2)1+cosx + cos(x/2) =0
3) 1 + cos(π +x ) + cos(π/2 + x/2) =0