If f(x)= 2x sin(x) cos(x), how do you find f'(x)?
1 Answer
May 15, 2015
Alternative answer:
Use trigonometry (sine of 2x) to rewrite the function first:
Now use the product rule and use the chain rule to get:
Simpply to get:
I know it doesn't look the same as the other answer. Use trigonometric identities to see that the answers are equivalent.