(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Let g'(x)=-17x^{16}* sin(Ax^{9}) - 9Ax^{25}*cos(Ax^{9})

g(1)=143/9

Where A is a real number such that tanA=1/sqrt(80), 0<A<pi/2

Find g(0)

3. The attempt at a solution

I was able to get the antiderivative of g'(x), so that:

g(x) = -x^{17}*sin(Ax^{9})

I got A=6.3794 degrees.

BUT, I don't get g(1)=143/9

What am I doing wrong? Did I assume wrong that the g'(x) was created by the product rule?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Calculus: trig functions anti-derivatives

**Physics Forums | Science Articles, Homework Help, Discussion**