Does anyone know how resolve it?

1

Step-by-step explanation:

90°/n = 90°/∞ --> 0 , because when you divide number by huge number answer will become less and less, when you divide by ∞, answer will ---> 0.

cos(0°) = 1

1^(2n) = 1^(2∞)= 1^(∞) = 1, because 1 in any power = 1.

Because lim of constant is this constant.

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8