Question

Helpppppppppppppppppppppp

Answer 1

For this case what you should do is evaluate the function at a point where you can find the value of and without problems.
So we have to:
y = sin (x + 90)
We evaluate x = 0
y = sin (0 + 90)
y = 1
Answer:
y = sin (x + 90)
Option A