Question

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Answer 1

We evaluate the function at a known point.
 We have that for x = 0
 y = sin (x + 90)
 y = sin (0 + 90)
 y = sen (90)
 y = 1
 Then, the function sought will be:
 y = sin (x + 90)
 Answer:
 y = sin (x + 90)
 option A

Answer 2

The allknowing wanser is c