calculate the derivative of the function log(sin(2x)), simplify the result

pretty(simplify(diff('log(sin(2*x))','x'))) Error using diff Difference order N must be a positive integer scalar.

[Jan]

@Yaser: In your example the input for diff() is a string, which is treated like a numerical vector containing ASCII codes. Most likely you want a symbolic expression, so see KSSV's answer.

Answer 1

[KSSV]

syms x
f = log(sin(2*x));
pretty(simplify(diff(f)))