Friday

August 22, 2014

August 22, 2014

Posted by **ashley** on Tuesday, February 12, 2013 at 5:14pm.

- calculus -
**Reiny**, Tuesday, February 12, 2013 at 5:45pmf ' (x) = (2/cosx)(-sinx) = -2tanx

f '' (x) = - 2sec^2 x

**Related Questions**

calculus - Let f(x) = 2ln(cosx), find f''(x)

Calculus - Evaluate (integral) cot 2x dx. A. 1/2Ln sin 2x+C B. 1/2Ln cos 2x+C C...

Pre-Calc - Trigonometric Identities Prove: (tanx + secx -1)/(tanx - secx + 1)= ...

Math - Verify the identity . (cscX-cotX)^2=1-cosX/1+cosX _______ sorry i cant ...

Trigonometry Check - Simplify #3: [cosx-sin(90-x)sinx]/[cosx-cos(180-x)tanx] = [...

Calculus - I know how to do this problem, but I'm stuck at the arc length ...

Calculus..more help! - I have a question relating to limits that I solved lim(x...

Calculus - Find the area between y=cosx and y=sinx from 0 to 2pi. To find the ...

Trig........ - I need to prove that the following is true. Thanks (cosx / 1-sinx...

Math - How many solutions does the equation cosx + 1/2 = 1 have for 0<x<...