2cos*2x-cosx=1 find all solutions to

Verify the identity:tanx(cos2x) = sin2x - tanx Left Side = (sinx/cosx)(2cos^2 x -1) =sinx(2cos^2 x - 1)/cosx Right Side = 2sinx
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2. asked by Ashley
3. 1,295 views
Please help!!!!!!!!!!! Find all solutions to the equation in the interval [0,2π).8. cos2x=cosx 10. 2cos^2x+cosx=cos2x Solve
1. 5 answers
2. asked by Anonymous
3. 883 views
2cos*2x-cosx=1 find all solutions to the equation on the domain [0,2ð]i got ð/4, 7ð/4, 3ð/4, and 5ð/4 but only got two out
1. 1 answer
2. asked by Kindell
3. 1,166 views
Find all solutions of the equation in the interval [0,2pi)2 cos^2 x-cos x = 0 -2cos^2 + cosx + 0 (x+1/2) (x+0/2) (2x+1) (x+0)
1. 1 answer
2. asked by Anonymous
3. 1,454 views
solve 2cos^2x = square root of three cosx (couldnt find the sign on keyboard sorry) for principal values of x. express the
1. 2 answers
2. asked by Kathy
3. 828 views
prove the identity(sinX)^6 +(cosX)^6= 1 - 3(sinX)^2 (cosX)^2 sinX^6= sinx^2 ^3 = (1-cosX^2)^3 = (1-2CosX^2 + cos^4) (1-cosX^2)
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2. asked by JungJung
3. 943 views
Approximate the equation's solutions in the interval (0,2pi)sin2x sinx = cosx 2cos(x) (1/2-sin^2x) = 0 Then I got 3pi/2, pi/2,
1. 2 answers
2. asked by Abbey
3. 959 views
solve for 0=/<x<2pi6sin^2x + sinx - 1 = 0 Ahh, forgot how to factor. 3cos^2 - 2cos - 1 = 0 (3cosx + 1 )(cosx - 1) cosx= -1/3, 1
1. 3 answers
2. asked by sh
3. 583 views
Which of the following are trigonometric identities?(Can be more then one answer) tanx cosx cscx = 1 secx-cosx/secs=sin^2x
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2. asked by Jill
3. 4,837 views
tanx+secx=2cosx(sinx/cosx)+ (1/cosx)=2cosx (sinx+1)/cosx =2cosx multiplying both sides by cosx sinx + 1 =2cos^2x sinx+1 =
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2. asked by shan
3. 1,018 views