hellyeah the trigonometry!

I'm so frustrated because of my #superidiot brain!
I can't answer two of four questions!
what the hell?
ah God, I don't want to have remedial!
I've tried my best!
I've studied for more than 5 hours last night!
But why, I still can't do the best? Why I still can't answer it all?
Please! Gimme a chance to turn back the time so I can answer it all! *wishing