Function y = sin (INX) + cos (INX) =?

Y = f (x) = sin (INX) + cos (INX) =? Let t = LNX, y = f (T) = Sint + cost = √ 2Sin (T + π / 4), that is, y = √ 2Sin (LNX + π / 4)

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1. Z = x ^ 2 + y ^ 2, and x = 1 + Sint, y = cost, find DZ / dt
2. Given the binary function z = e ^ X-Y, x = Sint, y = cost, then DZ / DT is
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