- #1
prime-factor
- 77
- 0
Homework Statement
ln(cos5(3x4))
Homework Equations
chain rule:
y = f(g(h)
y' = f'(g(h) x g'(h) x h'
The Attempt at a Solution
y' = 1 / ((cos5(3x4)) x 5((cos4(3x4)) x -sin(3x4) x 12x3
=> -5sin(3x4)(12x3) / cos(3x4)
=> -60x3sin(3x4) / cos(3x4)
=> -60x3tan(3x4)
=>No further simplification that I can see