Question

What is the derivative of f(x)=(sqrt2)^(cos(x))

Answer 1

Do you remember how to take the derivative of exponential functions that don't have a base of e?

If not, you might have to use logarithmic differentiation! :D
Take the natural log of both sides to start.

Answer 2

Take ln both sides

Answer 3

I did the exponential function derivative and it still said it was wrong

Answer 4

Is that what you came up with?
Don't forget to multiply by the natural log of the base when your base is not e!! :D