Asked by Kris

(cos πx + sin πy)4 = 54; Implicit Differentation
Answered by Reiny
clarification needed:

is it
(cos πx + sin πy)^4 = 54
or
(cos πx + sin πy)(4) = 54 ?
Answered by Kris
(cos πx + sin πy)4 = 54
Answered by Steve
well, when you finally figure it out, Kris, just remember that

-π cosπx + π cosπy y'

is the derivative of what's in the parentheses.