Hi guys, I need help solving my last 2 homework problems. The first one is:
INT (dy)/ Squareroot(16 + y^2)?

Question

anonymous · Answer

http://www.wolframalpha.com/input/?i=INT+%28dy%29%2F+Squareroot%2816+%2B+y^2%29%3F

anonymous · Answer

what is really easier is to look on the last page of the text, where all the formulas are. it will have 
$$\int\frac{dx}{\sqrt{a^2+x^2}}=\sinh(\frac{x}{a})$$  i am sure

anonymous · Answer

well it will really say 
$$\int\frac{dx}{\sqrt{a^2+x^2}}=\sinh^{-1}(\frac{x}{a})$$

anonymous · Answer

okay, I'm told to solve this by using trigonometric substitution. will the answer differ?

anonymous · Answer

ick.  it will be lots longer that is for sure

anonymous · Answer

Yeah, it's taking me like 30 minutes to go through one problem, and there's 30 in my homework..my notebook looks more like a math diary now..lol