Hello,

I have a homework question that asks to solve for x (which is time in seconds) in the sinusoidal function:y=4sin45x + 5, where y = 1

The answer is supposed to be 38, but I get 2 like this:

1 = 4sin45x + 5

-4 =4sin45x

-1 =sin45x

sin^{-1}(-1) = 45x

-90 = 45x

x=-2

What have I done incorrectly? Thanks for your help