**Solve 2cosx-sin^x +2 =0 for all real values of x jiskha.com**

Best Answer. 2 cos x - sec x = 1..note sec x = 1/cosx so we have. 2cosx - 1/cosx = 1 multiply through by cos x. 2cos^2 x - 1 = cos x rearrange... Solving sin(x) + cos(x) = 1 gives x = 2πk or x = π/2 + 2πk, where k is any integer. To solve this equation, we will make use of the... See full answer below.

**How do you solve secx equals 2 science.answers.com**

Sample Problems 1) Find the sin 2x if cos x = 3/5 and x is in quadrant I. Solution: sin 2x = 2 sin x cos x Since cos x = 3/5, sin x = 4/5. (Basic trig)... How do you solve sin(x/2)-cosx=0 with a restriction of [0,2pi)? We are supposed to be using the half angle formula ** cos half-angle formula: cos x/2=√[(1+cosx)/2] √[(1+cosx)/2]-sinx=0 √[(1+cosx)/2]=sinx square both sides (1+cosx)/2=sin^2x=1-cos^2x 1+cosx=2-2cos^2x 2cos^2x+cosx-1=0 (2cosx-1)(cosx+1)=0.. 2cosx-1=0 cosx=1/2 x=π/3 and 5π/3 or cosx+1=0 cosx=-1 x=π

**How do you solve secx equals 2 science.answers.com**

sec x = 2 cos x = 1/2 x = PI/3 and x=5PI/3 The period of cosine is 2PI The general solutions are: x= PI/3 + 2nPI, where n is any integer x = 5PI/3+2nPI, where n is any integer. times child care how to stay safe I have already reduced this to the problem of solving $\cos(2^n x)=\cos(x)$ for $x\in[0,\pi]$. Using Mathematica and $n\in\{1,2,3,4\}$ , I concluded that the solutions must be $\{\frac{2k\pi}{2^n-1},\frac{2k\pi}{2^n+1}\}\cap[0,\pi]$ .

**How do you solve secx equals 2 science.answers.com**

2003-12-08 · Ah yes, the next derivative 2 + cosx is always positive. So f' is always increasing. So 2x=-sinx has only one solution. So f' is always increasing. So 2x=-sinx has only one solution. how to solve quadratic functions by graphing sec x = 2 cos x = 1/2 x = PI/3 and x=5PI/3 The period of cosine is 2PI The general solutions are: x= PI/3 + 2nPI, where n is any integer x = 5PI/3+2nPI, where n is any integer.

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### 2sinx=Square root of 2 Wyzant Ask An Expert

- How do you solve secx equals 2 science.answers.com
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- How do you solve secx equals 2 science.answers.com
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## How To Solve 2 Cosx 2

When you see a 1+sinx or a 1+cosx or something like that in a denominator, multiply both the numerator and the denominator by a conjugate (i.e. 1-sinx or 1-cosx)

- Solving sin(x) + cos(x) = 1 gives x = 2πk or x = π/2 + 2πk, where k is any integer. To solve this equation, we will make use of the... See full answer below.
- 2010-06-16 · because of the fact the brackets are equivalent to 0, each bracket =0 subsequently the two 2cosx-a million=0 from which cosx=a million/2 and x=(pi)/3 and 5(pi)/3 or sinx-a million=0 so as that x=(pi)/2 Why use the identities you reported?
- 2011-03-04 · I'm working on a homework problem that seems to be giving me some trouble. The problem is: (sin x + cos x)^2 -1 = sin 2x If somebody could show me how to solve it, …
- math. Solve 2cosx-sin^x +2 =0 for all real values of x . asked by Alex on April 15, 2010; Math. Find all real solution of the equation sin^2x = -2+2cosx