Wednesday

December 17, 2014

December 17, 2014

Posted by **yo** on Tuesday, December 20, 2011 at 4:48pm.

aydame por favor

gracias

- matematicas -
**Steve**, Tuesday, December 20, 2011 at 6:21pm1 - (cosx)^2 + cosx + 1 = 0

cos^2 - cos - 2 = 0

(cosx - 2)(cosx + 1) = 0

cosx no puede ser 2

cosx = -1

x = pi

**Answer this Question**

**Related Questions**

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

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

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

Trigonometry. - ( tanx/1-cotx )+ (cotx/1-tanx)= (1+secxcscx) Good one! ...

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

maths - hey, i would really appreciate some help solving for x when: sin2x=cosx ...

Math - Pre- Clac - Prove that each of these equations is an identity. A) (1 + ...

trigonometry - can i use factoring to simplify this trig identity? the problem ...

check math - Here are my answers. Can you check if I got the right answers? ...

Mathematics - Trigonometric Identities - Prove: (tanx)(sinx) / (tanx) + (sinx...