## TransendentialPI Group Title This exercise is in a section about using trig substitution to integrate. I can use trig sub, but I'm just not seeing what initial substitution to use so I can apply trig sub. Can anyone give me a hint? I don't need (don't want) it solve to the end. At least not yet. 2 years ago 2 years ago

1. TransendentialPI Group Title

See attached

2. mukushla Group Title
3. TransendentialPI Group Title

The trick is, how do we get this integral into the form$dx \over \sqrt{u^2 +a^2}$

4. TransendentialPI Group Title

sorry du on top

5. violy Group Title

note, 16+x^6= (4)^2+(x^3)^2. or (x^3)^2+(4)^2.

6. violy Group Title

what will be the a ? and what will be the u?

7. violy Group Title

then, get the derivative of u.

8. TransendentialPI Group Title

Thanks, that is just what I needed.

9. violy Group Title

most welcome:))