Question

A few trig questions:

1. True or False: for a one-to-one function, y=f(x), then x=f^-1(y). Explain the answer please.

2. True or False: For any function, x=f^-1(y), then y=f(x). Explain your answer.

3. The graph y=sinx is increasing on the interval [pi/2, 3pi/2]

Answer 1

I know the answers to these questions, but I just can't explain why they're true/false :(

Answer 2

I might be wrong, but are these the answers?

1. True

2. True

3. False

Answer 3

hey! i would totally love to help you!! but i finished trig with a b and its been a while so i dont want to give you the wrong answers!!

Answer 4

Ah, alright x) Know anybody that *could* help me? :o

Answer 5

Or at least could you give it your best shot? x)

Answer 6

i can tag some people, but no guarentee......most these people (especially Josh) are science nerds XDD

@iPwnBunnies
@nincompoop
@anonymous_user

nobody else i am following or whatever is on....sorry!
hope they can help!

Answer 7

Alright, thanks :D

Answer 8

o_o
I haven't taken Trig yet.

Answer 9

lol my bad @anonymous_user !....for some reason i thought you had xD

Answer 10

Ye. Especially Josh. Thanks a bunch, Kenzi.
1. Should be true. Take any equation of a line, basically.
2. It should be true. I'm not exactly sure.
3. Totes false. Sin x is decreasing from pi/2 to pi, at least. So it's not strictly increasing or decreasing on interval pi/2 to 3pi/2

Answer 11

your welcome Josh :) Love you!!! hehe

Answer 12

Alright, thanks Bunnies~ But could you explain number one a bit more?

Answer 13

Sure, a one-to-one function means for every x-value, you get a unique y-value.
The best example of this is any line.

Let's say y = 3x+ 5 is our line.

If we find the inverse: x = 3y + 5
The inverse is also a line.

Answer 14

I feel like I'm not explaining this correctly. Sorry, I'm a little drained and need fewd.

Answer 15

Ah, alrightttt

Answer 16

Thanks anyway! :D Here, have a medal~