Friday

August 1, 2014

August 1, 2014

Posted by **Haley** on Tuesday, November 20, 2012 at 3:27pm.

#2 (1+tan x)^2= 2 tan x+2

#3 cos^2x-sin^2 x+1=cos x

please show all work & thanks

- pre-calc help !!!!!!! -
**Damon**, Tuesday, November 20, 2012 at 3:35pmcos x + 1/cos x = 2

cos^2 x -2 cos x + 1 = 0

(cos x - 1)(cos x - 1) = 0

cos x = 1

x = 0

Now you do some

**Related Questions**

Trigonometry desperate help, clueless girl here - 2. solve cos 2x-3sin x cos 2x...

precalculus - For each of the following determine whether or not it is an ...

Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...

Integration - Intergrate ¡ì sec^3(x) dx could anybody please check this answer. ...

Trigonometry - 1.Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two ...

Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...

Trigonometry - Please review and tell me if i did something wrong. Find the ...

trigonometry hlp me - 6.Prove that tan y cos^2 y + sin^2y/sin y = cos y + sin y...

MATH - Hi, I really need help with these questions. I did some of them halfway, ...

Trig. - sec^2xcotx-cotx=tanx (1/cos)^2 times (1/tan)-(1/tan)=tan (1/cos^2) times...