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# Sine rule

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1. Hey guys,
does anyone know the sine rule for angles???
does anyone know the cosine rule for angles???
2. yes what do you want to know about it?
3. yes, SinA/a = SinB/b, where A is an angle and a is a length of a triangle

~
4. (Original post by chemistry igcse)
yes what do you want to know about it?
I wanted to know what the equations were
if you could tell me that would be much appreciated
5. (Original post by Virolite)
yes, SinA/a = SinB/b, where A is an angle and a is a length of a triangle

~
Thank you so much,
you have literally saved me
because I doing an exam practice paper for my maths revision
and I was panicking
I wouldn't call it revision though as Im asking for help
well that's just me LOL
thanks again
6. (Original post by AmirahxRashid)
Thank you so much,
you have literally saved me
because I doing an exam practice paper for my maths revision
and I was panicking
I wouldn't call it revision though as Im asking for help
well that's just me LOL
thanks again
no worries pal
7. Sine rule for angles is Sin(A)/a=Sin(B)/b
Cosine rule for angles is Cos(A) =b2 + c2 - a2/2bc Therefore A = Cos-1(b2 + c2 - a2/2bc)
8. (Original post by 34908seikj)
Sine rule for angles is Sin(A)/a=Sin(B)/b
Cosine rule for angles is Cos(A) =b2 + c2 - a2/2bc Therefore A = Cos-1(b2 + c2 - a2/2bc)
Thank you so much
im guessing u just rearranged the formula right
thanks

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