C3 Trig Identity Question!
Can anyone help? Been stuck for a while...
Thanks!
Prove the identity sinx+cosx=(1-2cos^2x)/(sinx-cosx)
Thanks!
Prove the identity sinx+cosx=(1-2cos^2x)/(sinx-cosx)
Original post by DonHorizon
Can anyone help? Been stuck for a while...
Thanks!
Prove the identity sinx+cosx=(1-2cos^2x)/(sinx-cosx)
Thanks!
Prove the identity sinx+cosx=(1-2cos^2x)/(sinx-cosx)
Start from the RHS, try using
Original post by NotNotBatman
Start from the RHS, try using
Thanks! That's what I tried to do at first but I just can't seem to get it to work!
Original post by DonHorizon
Thanks! That's what I tried to do at first but I just can't seem to get it to work!
Could you show what you have done?
Original post by NotNotBatman
Could you show what you have done?
I got into a position where I had 2sin^2x-1/sinx-cosx
Original post by DonHorizon
I got into a position where I had 2sin^2x-1/sinx-cosx
try to get (sin^2x - cos^2x) on the top
Original post by DonHorizon
I got into a position where I had 2sin^2x-1/sinx-cosx
Okay, I've just jotted it down. Easiest way to do it is to start from the RHS and use , then it's straightforward from there.
Original post by NotNotBatman
Okay, I've just jotted it down. Easiest way to do it is to start from the RHS and use , then it's straightforward from there.
Ahh! I've done it now! Thanks so much!
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