Please help me get started or to complete this proof...have been working on six problems all week and have this one left and running out of time!
[sin (a+b)]/[sin a + sin b] = [sin a -sin b]/[sin (a-b)]
Any guidance would be appreciated!
Hi Grandad, Thanks for responding.
I did know those formulas and have been trying to work with them. I don't understand how you got the bottom on the right side to be that?
As far as I knew,
I thought that sin (a-b) could only be changed into sinacosb-sinbcosa using the sum and difference identities...
Am I missing something?
Don't confuse this with . That's a different formula altogether (although it is one of the ones that is used to derive the Sum to Product formulae).