B BlueWolfCry Member : 02 LX, 03 MSP Apr 5, 2004 #1 solve for x: 2(cos^2)(x) - 3(cos)(x)+1 = 0 help please!! thank you!!
S servoeyes Member Apr 5, 2004 #3 I'll give you a hint: sin^2 (x) + cos^2 (x) = 1 That should give you a good idea of where to go...
M msubullyfan Yeah, I'm an engineer... : 2005 Nissan Frontier 4x4 Apr 5, 2004 #5 MinnowGT said: (2cos(x) - 1) * (cos(x) - 1) = 0 Click to expand... That's the right path. Don't think the sin^2(x) + cos^2(x) = 1 identity helps in this problem. Here's a similar problem... should give you everything you need to solve this problem... http://www.sosmath.com/algebra/solve/solve9/s96/s96.html
MinnowGT said: (2cos(x) - 1) * (cos(x) - 1) = 0 Click to expand... That's the right path. Don't think the sin^2(x) + cos^2(x) = 1 identity helps in this problem. Here's a similar problem... should give you everything you need to solve this problem... http://www.sosmath.com/algebra/solve/solve9/s96/s96.html
O osudewd Member : 2000 ES Apr 6, 2004 #6 BlueWolfCry said: solve for x: 2(cos^2)(x) - 3(cos)(x)+1 = 0 help please!! thank you!! Click to expand... Technically there are an infinite number of answers unless you have a restricted interval. If it is something like 0-2pi, then you'll have pi/3 and 5pi/3 as solutions.
BlueWolfCry said: solve for x: 2(cos^2)(x) - 3(cos)(x)+1 = 0 help please!! thank you!! Click to expand... Technically there are an infinite number of answers unless you have a restricted interval. If it is something like 0-2pi, then you'll have pi/3 and 5pi/3 as solutions.
