**4cos2X-1=0 Course Hero**

25/04/2010Â Â· Solve the equation: 7 sin(x) + cos(2x) = - 3. Find the second-smallest positive answer, in degrees, to the nearest 0.1 degrees. I can-t factor this when I get it down to 2sin^(x) - 7sin(x) - 4=0... 1/03/2010Â Â· Simple question. I'm looking for the intersections between the functions f(x) = cos2x and g(x) = sin2x, so obviously I need to equate them. And I'm only looking for the intersections between 0 and 2 Ï€.

**f(x) = cos2x..... find f ' (x) f " (x) f "' (x) f^4**

Diï¬€erential Equations DIRECT INTEGRATION Graham S McDonald A Tutorial Module introducing ordinary diï¬€erential equations and the method of direct integration... 29/11/2010Â Â· Solving sin2x = 1/2 requires the knowledge of the period change from 360 to 180 degrees. The change of the period makes an impact on the number of â€¦

**1-2sinx-4cos2x=0 Master Your Classesâ„¢ Course Hero**

29/11/2010Â Â· Solving sin2x = 1/2 requires the knowledge of the period change from 360 to 180 degrees. The change of the period makes an impact on the number of â€¦... Set that equal to 1 and then solve for tan x, and find solutions as usual. EDIT: Although maybe it would be easier to solve tan(2x) = 1 for 2x between 0 and 4pi, and them half all of your solutions. 0

**What is the general solution of the differential equation**

Solutions to Selected Exercises for Introductory Di erential Equations, Fourth Edition, Abell & Braselton Martha L. Abell and James P. Braselton c 2013 Exercises 1.1 1. Second order linear ordinary di erential equation. The forcing function is f(x) = x3 so the equation is nonhomogeneous. 3. Second order linear partial di erential equation. 5. This is a rst order ordinary di erential equation... we used sin 2x and sin 6x to make the solution easy . there is no hard and fast rule that you have to use these two only . it totally depends upon you how you solve it but just to make the solution easy we try to choose and pair up the smallest and the largest angles in these type of questions.

## How To Solve 8sin2x 4cos2x 7

### 3sin2x+4cos2x=2 solve for x Math - Trigonometric

- Solve 4cos2x+10sinx-7=0? Yahoo Answers
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## How To Solve 8sin2x 4cos2x 7

### If I tell you a+bi = 7âˆ’9i and ask you to solve for a and b, you know immediately that a = 7 and b = âˆ’9, right? More formally, if two complex numbers are equal, their real parts must be equal and their imaginary parts must be equal. So the above equation in sines and cosines is actually two equations, one for the real part and one for the imaginary part.

- Let us not worry with the solutions of the homogeneous equation associated to the given ode (this part is the easy one). The main problem is to find a particular solution of the given ode.
- 14/12/2009Â Â· Solve 4cos2x+10sinx-7=0 Hardest questions on my test, brought me down like crazzy
- Before we move on past the method of undetermined coefficients, I want to make and interesting and actually a useful point. Let's say that I had the following nonhomogeneous differential equation: the second derivative of y minus 3 times the first derivative minus 4y is equal to-- now this is where
- Try solving numerically, say with Newton-Raphson iteration. Or graph it, probably the simplest. Use Wolfram Alpha. For this case, x = 0 is one answer. Graphing it will tell you if thereâ€™s more than one solution. My intuition tells me there are no other solutions though (I could be wrong). #1

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