Rob B
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Registered: 8th Jan 04
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hey guys,
Ive got a test tomorrow and i know how to transpose everything except division really.
Basically say i had
a / SinA = b / SinB
How would you make B the subject ?
Thanks its racking my brains.
Rob
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AndyKent
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Registered: 3rd Sep 05
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times by SinB?
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Matt H
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Registered: 11th Sep 01
Location: South Yorkshire
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U2U sent
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LeeM
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Registered: 26th Sep 05
Location: Liverpool
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b = a/SinA x SinB
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dean101287
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Registered: 22nd Jul 07
Location: Cardiff
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(a/SinA) x SinB = b
Thats what I would do anyway
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Rob B
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Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
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Sorry i mean i want to find the big B on its own without the SIN.
thanks
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daymoon
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Registered: 1st Aug 08
Location: Selby, North Yorkshire
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(a * sin B)/sin A
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Rob B
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Registered: 8th Jan 04
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Can you show me how you work it out ? Sorry to be a pain but i have a test tomorrow and have to show workings, Thanks again great help
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Ste
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Registered: 5th Mar 03
Location: Taif, Saudi Arabia
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I'd say it was
(a/SinA) / (b/Sin) = B
I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.
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daymoon
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Registered: 1st Aug 08
Location: Selby, North Yorkshire
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it really simple
a ............... b
-........ = ...... -
sin A..........sinB
All you do is multiply both sides by sin B ( so thats a x sinB and (sinB x b)/sinb)
sinB on RHS cancels out and u get what i written in my first post. hope thats isnt confusing....
ignore dots
[Edited on 21-10-2009 by daymoon]
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Rob B
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Registered: 8th Jan 04
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Does anyone know for deffinet ?
Cheers for everyone helping though
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daymoon
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Registered: 1st Aug 08
Location: Selby, North Yorkshire
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http://www.mathcentre.ac.uk/students.php/all_subjects/trigonometry/sine_cosine/resources/52
have a look there. i think it proves i am right
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Rob B
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Registered: 8th Jan 04
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quote: Originally posted by daymoon
it really simple
a b
- = -
sin A sinB
All you do is multiply both sides by sin B ( so thats a x sinB and (sinB x b)/sinb)
sinB on RHS cancels out and u get what i written in my first post. hope thats isnt confusing....
I thought you couldn't move the denominator, or is it the other one you can't move ?
I still don't get it as i want just the big B on it's own.
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daymoon
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Registered: 1st Aug 08
Location: Selby, North Yorkshire
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ah you want the big B? lol sorry you will need to do sin-1 on you calc. so you need to rearrange the formula to:
(SinA x b)/A=SinB
and then put answer for (SinA x b)/A into your calc, but use Sin-1 function and then put the asnwer.
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jamied
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Registered: 27th Oct 03
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gobbledegookx5 (dont understand) x6
really tho looks like gibberish
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daymoon
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Registered: 1st Aug 08
Location: Selby, North Yorkshire
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i used to do this shit for a level maths
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Ian
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Registered: 28th Aug 99
Location: Liverpool
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Your problem is that you are operating a function on B.
You need arcsine.
http://en.wikipedia.org/wiki/Inverse_trigonometric_functions
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