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Help with my trigonometry
Maor:
So I have a test tomorrow and I'm stuck at one question.
I need to prove these two equations equal.
sin^4a-cos^4a = sin^2a-cos^2a
Now, I have no idea what I can do from here, or how can I proceed, help please?
snot2:
they are the same but one has a 2 instead of a 4
Maor:
--- Quote from: snot2 on October 21, 2009, 01:42:34 PM ---they are the same but with a 2 instead of a 4
--- End quote ---
Snot, this is a serious moment.
Jetlok:
WhoDa?:
Maybe because both equal 1?