Thread: Pre-Calculus Homework help

Ok here are the directions on the worksheet that I got from my Pre-Calculus teacher:
Find the exact value of each expression. If it is defined.

1. sin -1 1/2


P.S: I dont know how to type i sub script can someone help me with that?

Originally Posted by PrattX

Ok here are the directions on the worksheet that I got from my Pre-Calculus teacher:
Find the exact value of each expression. If it is defined.

1. sin -1 1/2


P.S: I dont know how to type i sub script can someone help me with that?

How di you get that answer?

ok I'm starting to understand but I thought it would be 210 degrees becuase it's the inverse of sin. I'm still a little confused.

inverse sine is only defined in quadrants I and IV

range of the inverse sine function is

oh ok..can you just name all the inverses of all the trigonometric funtions so I can write them down for a latter date.

research it yourself ...

inverse trig functions - Google Search

Ok thanks for the help with that but i have another question:

13. sin(sin -11/4)

1/4

how did you get that

do some research and find out why.

i did some research and I dont understand what I'm reading that's why I asked you.

do you understand the concept of an inverse?

a function maps a value x to y

the inverse of that function maps the value y back to x