Wednesday

November 26, 2014

November 26, 2014

Posted by **Mac** on Monday, March 2, 2009 at 6:24pm.

- Math -
**Reiny**, Monday, March 2, 2009 at 6:36pmI will assume your domain is 0 --- 360

2sin^2x+cosx-2=0

2(1- cos^2x) + cosx - 2 = 0

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

2cos^2x - cosx = 0

cosx(2cosx - 1) = 0

cosx = 0 or cosx = 1/2

x = 90º or 270º or x = 60º or x = 300º

these can be easily converted to radians

**Answer this Question**

**Related Questions**

Math - Trig - Double Angles - Prove: sin2x / 1 - cos2x = cotx My Attempt: LS: = ...

Math - Solve each equation for 0≤x<2π 1. (cosX)(cosX+1)=0 2. 2sin^...

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

Math - (cosx - sinx)^2 + (cosx + sinx)^2 = 2 Iam in this step: 2cos^2(x) + 2sin^...

math - tanx+secx=2cosx (sinx/cosx)+ (1/cosx)=2cosx (sinx+1)/cosx =2cosx ...

Trigonometry - Solve for the following equation to the nearest degree if needed ...

math - solve each equation for 0=/<x=/<2pi sin^2x + 5sinx + 6 = 0? how do ...

pre-cal - show solution solve. 2sin^(2)x=2+cosx

trig - Find all solutions of the equation 2sin^2x-cosx=1 in the interval [0,2pi...

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