# Recent content by Gill

1. ### Quick question

i got this question from a friend and its bugging me because i cannot understand it. i just cannot understand what it means... here is it, word for word what i have on the assigned paper "if f(x) = x^n , "n" is a positive interger, the first derivative of f(x) which is identically zero is "...
2. ### Stupid brain cramp

hey, i need to simplify this, and im having a brain fart:confused: ...can u help me? f(x)= cosx(3cos3x) + (sin3x)(-sinx) i then have to find f(pi/6), but im hoping i can do that once this is simplified... thanks Gill
3. ### Parabola problem

Hey I have a math problem that does not seem to work out. It is a word problem about a suspension bridge. The bridge's main cable is in the shape of a parabola, and the entire bridge, the road, is 200 ft long. The ends of the bridge, the longest virtical cables on the bridge, are 50 ft...
4. ### Trig Proof

it works! thanks
5. ### Trig Proof

sorry but that still seems to not work, wat can i do? am i doing something wrong?
6. ### Trig Proof

yea ok this problem has been making me mad for the past 2 weeks or so (it's a summer project due next week) any help would b great sqrt of ((1-sinx)/(1+sinx))= |secx-tanx| i tried: =|secx-tanx| =|(1/cosx)-(sinx/cosx)| =|(1-sinx)/cosx| and i need it to equal the other side without...