Posted by **Ifi** on Sunday, October 28, 2012 at 10:07am.

Differentiate ln (1+ cos x)...

My ans is (-sin x)/ (1+cos x), but at wolfram is

-tan (x/2). I think they simplify it but how did they do it? Sorry for my little knowlegde....

## Answer this Question

## Related Questions

- calculus - Differentiate. y= (cos x)^x u= cos x du= -sin x dx ln y = ln(cos x)^x...
- Calc. - Differentiate. y= (cos x)^x u= cos x du= -sin x dx ln y = ln(cos x)^x ln...
- Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...
- Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
- algebra - Can someone please help me do this problem? That would be great! ...
- precalculus - For each of the following determine whether or not it is an ...
- Math(Please check) - Use the fundamental identities to simplify the expression. ...
- Trigonometry - Please review and tell me if i did something wrong. Find the ...
- trig 26 - simplify to a constant or trig func. 1. sec Ču-tan Ču/cos Čv+sin Čv ...
- Trig. - tan^2BeatacscBeta-tan^2 (simplify) (sin/cos)^2Beta times 1/sin-(sin/cos...