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I'm still lost.. how do you get from one to the other?

Right, if A = arcsin(x) and B = arccos(x), what would the addition identity give?

=arcsin(x) arccos(x) + no idea because sin is not given for b?

nor cos for A

Kind of, yes.

okay, yes following so far.

so.. it ends up being? (√1)?

Which simplifies to?

1..?

Exactly!

!!?! I get it! Thank you so much!

You're welcome.