A-Level Maths: B8-11 Functions: Introducing Inverse Functions and Restricting the Domain

[lukeollerhead]

When I pop "arcsin(-0.8)" into my Casio calculator I get -53.1(deg).... Its just occurred to me (after 3 years of trig) that behind the scenes, the calculator is setting a restriction on the domain of sinx to ensure one-to-one. I always wondered (and got annoyed at) why it didnt just give me the first "positive" result (233.1). Your explanation has helped so much!!

[sayanseeboo]

Well done sir, most certainly subscribed. Keep up the good work.
I don’t usually write comments. But I have to give credit where its due. Your explanations are simple and crystal clear. Amazing job.

[AledorLearns]

WHY. WHY DIDNT MY TEACHER INTRODUCE FUNCTION LIKE THIS TO ME. I'm so grateful that I found your channel sir.

[shivfernando]

Maybe they should change it to "I" rather than "1" for inverse functions. Unless it is already in use for somthing else.