Question

Calculando a expressão y = 4.senx - 1, para x= 90º , temos:
a) -2
b) 3
c) -1
d) 1
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Answer 1

$y = 4.sen(90) - 1$

$y = 4.1 - 1$

$y = 4 - 1$

$y = 3$

Letra D)