Sunday

April 20, 2014

April 20, 2014

Posted by **Argelia** on Wednesday, February 13, 2013 at 12:44am.

2cos^2x-5sinx+1=0

- pre-cal -
**Steve**, Wednesday, February 13, 2013 at 1:12pm2(1-sin^2)-5sin+1=0

2sin^2 + 5sin - 3 = 0

(2sin-1)(sin+3) = 0

so, sinx = 1/2 or -3

-3 is not allowed, so

sinx = 1/2: x = pi/6 or 5pi/6

**Related Questions**

pre-cal - solve for all values in [0,2pie) 2sin^2x-1=0

Pre Cal - Solve 4sin^2 x + 4sqrt(2) cos x-6 = 0 for all real values of x. My ...

Pre Cal. - So I posted these...but no one answered them. Are they right? Solve ...

CALCULUS - Find and Classify, the absolut extreme values of each function on the...

Pre-Cal - Solve 5sinx=-4cosx for 0 less than or equal to x <2pi answers to ...

Pre-Cal - verify the identity sin x(1 - 2 cos^2 x + cos^4 x) = sin^5 x 1-2cos^2 ...

maths - 1. Prove using mathematical induction that 1+2+3+...+n=[ n(n+1)]/2 2. ...

maths - 1. Prove using mathematical induction that 1+2+3+...+n=[ n(n+1)]/2 2. ...

trig - solve 2cos^2x-sinx=1, 0 < or equal to x < 2pie

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