Asked by Kels.
I'm having trouble solving this proof. Can you help?
cos^3+sin^3/cosx+sinx = 1-sinxcosx
Thanks!:)
cos^3+sin^3/cosx+sinx = 1-sinxcosx
Thanks!:)
Answers
Answered by
Steve
recall that a^3 + b^3 = (a+b)(a^2 - ab + b^2)
cos^3 + sin^3 = (cos+sin)(cos^2 - sin*cos + sin^2)
look easier now?
cos^3 + sin^3 = (cos+sin)(cos^2 - sin*cos + sin^2)
look easier now?
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