# a level trigonometric functions

Watch
Announcements
#1
could someone help me out with 5c please?
i've attached my answers for 5a and 5b just in case they need to be used to work out 5c
thanks

Last edited by abovethecl0uds; 1 month ago
0
1 month ago
#2
(Original post by abovethecl0uds)
could someone help me out with 5c please?
i've attached my answers for 5a and 5b just in case they need to be used to work out 5c
thanks

Hey, for an inverse function , The domain is the range of the original function and the range is the domain of the original function
0
#3
(Original post by Faith&hardwork)
Hey, for an inverse function , The domain is the range of the original function and the range is the domain of the original function
hey!
thanks for your reply. i know that the domain and range swap around, but i don't know how to express that in terms of f^-1(x)
0
1 month ago
#4
(Original post by abovethecl0uds)
hey!
thanks for your reply. i know that the domain and range swap around, but i don't know how to express that in terms of f^-1(x)
First start by separating the y from x, u should get a linear. eqn = trigonometry function....then replace y for x.... It then become clear
Last edited by Faith&hardwork; 1 month ago
0
1 month ago
#5
Try rearrange the equation to make x the subject, then replace your x with a y and vice versa!
0
#6
(Original post by Faith&hardwork)
First start by separating the y from x, u should get a linear. eqn = trigonometry function....then replace y for x.... It then become clear
(Original post by awc14)
Try rearrange the equation to make x the subject, then replace your x with a y and vice versa!
this is what i've done, but i'm not sure what to do after this
Last edited by abovethecl0uds; 1 month ago
0
1 month ago
#7
(Original post by abovethecl0uds)
this is what i've done, but i'm not sure what to do after this
Take the cosine of both sides...you will be left with y=cos....., hence replace y=f inverse
0
#8
(Original post by Faith&hardwork)
Take the cosine of both sides...you will be left with y=cos....., hence replace y=f inverse
oh okay thanks so much for the help!
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### How would you describe the quality of the digital skills you're taught at school?

Excellent (35)
9.94%
Okay (104)
29.55%
A bit lacking (128)
36.36%
Not good at all (85)
24.15%