How do I take the cosine inverse of numbers greater than 1

There is a problem on my homework that says let y=3.7. By doing the appropriate algebra and taking the inverse cosine, find the value of theta. I tried plugging in 3.7 on my calculator but it gives me an error. Is there a method to convert 3.7 into a number less than 1? I also need to do this with sin.

First the sin & cos functions have a max magnitude of 1 so the inverse sin or cos won't work if the magnitude of the argument is >1

You need to figure out what "the appropriate algebra" means. The must be more to the problem.

You can't.

All the values for cosine are between (or equal to) -1 and 1.

So there is no such thing as an inverse cosine of anything greater than 1 or less than -1.

You must have made a mistake in your algebra.

There's no way that's a complete question.

Was there a picture or something?

What is y even supposed to be? y can mean anything.

sin and cos limit at 1 if you got a order point to get what sin and cos are need to divide by the distance first then take your arcsin so it will look like this

arcsin{y/[(x^2+y^2)^.5]}

post entire question