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Eliseo Weimann

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Q: What is the solution to cos x equals 3 cos x - 2?
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Find the principal solution of sec x equals 2?

sec(x) = 2 so cos(x) = 1/2 and so x = pi/3


Find the derivatives of y equals 2 sin 3x and show the solution?

y = 2 sin 3x y' = 2(sin 3x)'(3x)' y' = 2(cos 3x)(3) y' = 6 cos 3x


How do you prove this trigonometric relationship sin3A equals 3sinA cos 2 A - sin 3 A?

sin(3A) = sin(2A + A) = sin(2A)*cos(A) + cos(2A)*sin(A)= sin(A+A)*cos(A) + cos(A+A)*sin(A) = 2*sin(A)*cos(A)*cos(A) + {cos^2(A) - sin^2(A)}*sin(A) = 2*sin(A)*cos^2(A) + sin(a)*cos^2(A) - sin^3(A) = 3*sin(A)*cos^2(A) - sin^3(A)


How many solutions does cos squared minus two cos equal three?

One solution. (cos x)2 - 2cos x = 3 Factor: (cos x - 3)(cos x + 1)= 0 cos x = {-1, 3} Solve: For cos x = -1, x = 180 deg No solution for cos x = 3


Determine exact solution for cosx - 0.5 equals 0?

cos x - 0.5 = 0 ⇒ cos x = 0.5 ⇒ x = 2nπ ± π/3


What is the solution to cos equals sec-sintan?

I'm not really sure what you mean by "the solution", but that equation cos = sec - sintan does simplify down to sin^2 + cos^2 = 1 which so happens to be an identity. I'm not sure if that's what you're looking for, but if it is, here are the steps in simplifying it. 1. Convert sec to 1/cos 2. Convert tan into sin/cos and multiply it by sin sintan = sin(sin/cos) = (sin^2)/cos You then have cos = 1/cos - (sin^2/cos) 3. Multiply everything by cos cos^2 = 1 - sin^2 4. And finally, send the sin^2 over to the left side by adding it (since it is being subracted on the right) You should see this sin^2 + cos^2 = 1 which is an identity.


Is x equals 2 a solution of 4x - 3 equals 5?

Yes, x = 2 is the solution.


Cos 5t cos 3t -square root 3 2 - sin 5t cos 3t?

The answer to the math question Cos 5t cos 3t -square root 3 2 - sin 5t cos 3t equals 0. In order to find this answer you will have to find out what each letter is.


Is 2 a solution of 4x-3 equals 5?

Yes. It is THE solution.


How do you solve for a if a cubed minus a squared times cosa minus 6 cosa equals 0?

The correct equation is a^3 - a^2*cos(a) - 6cos(a) = 0 which gives cos(a) = a^3/(a^2 + 6) This is not a simple equation to solve. In any case, before attempting a solution, it is necessary to know whether a is measured in degrees or radians.


Find the derivatives of y equals 2 sin 3x?

y=2 sin(3x) dy/dx = 2 cos(3x) (3) dy/dx = 6 cos(3x)


How do you solve the equation negative 3 cos t equals 1 in the interval from 0 to 2 pi?

Isolate cos (t): cos(t)=1/3. Use a calculator from here because the answer is not an integer or a simple number.