Question

Me ajudem aí galera? ??

Answer 1

x = (sen²90 - 2 sen 270 . cos 180 + cos²0) / (sen 0 + cos 360)
x = (1 - 2 . (-1) . (-1) + 1) / (0 + 1)
x = (1 - 2 + 1) / 1
x = 0 / 1
x = 0