Question

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Answer 1

the allknowing wanser is c

Answer 2

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