I am trying to imput tanh^4(0.5x) e^−sin2(x) into matlab but I am not sure how.

I need to use difference formula to estimate the derivative of the function f(x) = tanh^4(0.5x) e^−sin2(x).

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Answer 1

[Torsten]

syms x
f = (tanh(0.5*x))^4*exp(−sin(2*x));
df = diff(f,x)

What is the difference formula ?

Answer 2

[Voss]

Here's how to make a function handle out of f(x), assuming sin2(x) is (sin(x))^2, which you could use for whatever:

f = @(x)tanh(0.5*x).^4.*exp(-sin(x).^2)

f = function_handle with value:
    @(x)tanh(0.5*x).^4.*exp(-sin(x).^2)