@sumof1 This is proving via trigonometric function not by actual variables.
I just saw this one but this is very easy since it is a right triangle. Otherwise, you cant use Pythagorean identities here.
@Kiss_My_Axe said in it's been a year:
@dahlia hi. dont be sad and meet new friends. You and him are not fated so try to move on dear.
It's seems like u were feeling really lonely, I read all ur almost all ur posts of last few hours.
You can talk to me dear. I will make sure u won't feel lonely or alone when I am with u :)
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