Solve the equation 2 sec² x = 3 - tan x for the domain 0° ≤ x ≤ 360° ​

Answers

Answer 1

[tex]2 \sec^2 x = 3- \tan x \\\\\implies 2(1 +\tan^2 x) = 3- \tan x \\\\\implies 2 + 2 \tan^2 x +\tan x -3 =0\\\\\implies 2 \tan^2 x + \tan x -1 =0\\\\\implies 2u^2 + u -1 =0~~~ ;[\text{set} \tan x = u]\\\\\implies u = \dfrac{-1\pm \sqrt{1-4\cdot 2 \cdot (-1)}}{2(2)}\\\\\implies u =\dfrac{-1 \pm\sqrt{9}}{4}\\\\\implies u = \dfrac{-1 \pm 3}{4}\\\\\implies u = \dfrac{2}{4}=\dfrac 12~~ \text{or} ~~u =\dfrac{-4}{4} =-1\\\\[/tex]

[tex]\implies \tan x = \dfrac 12 ~~ \text{or} ~~ \tan x =-1~~~ ;[\text{Substitute back u =tan x}]\\\\\text{Now,}~ \\\\\tan x = -1,\\\\\implies x = n\pi - \dfrac{\pi}4\\\\\\\text{For interval,}~ [0,2\pi) \\\\x = \dfrac{3\pi}4, \dfrac{7\pi}4\\\\\text{In degrees,}~ x = 135^{\circ}, x =315^{\circ}\\\\\tan x = \dfrac 12\\\\\implies x = n\pi + \tan^{-1} \left(\dfrac 12 \right)\\\\\text{For interval} ~[0,2\pi),\\\\[/tex]

[tex]x=\tan^{-1} \left(\dfrac 12 \right), \left[\pi +\tan^{-1} \left( \dfrac 12 \right)\right]\\\\\text{in degrees,} ~~x=\tan^{-1} \left(\dfrac 12 \right), \left[180^{\circ} +\tan^{-1} \left( \dfrac 12 \right)\right]\\\\\\\\\text{Combine all solutions:}\\\\x=\dfrac{3\pi}4, \dfrac{7\pi}4, \tan^{-1} \left(\dfrac 12 \right), \left[\pi +\tan^{-1} \left( \dfrac 12 \right)\right]\\\\\\[/tex]

[tex]\text{In degrees,}~ x = 135^{\circ},~315^{\circ},~\tan^{-1} \left(\dfrac 12 \right), \left[180^{\circ} +\tan^{-1} \left( \dfrac 12 \right)\right][/tex]


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Step-by-step explanation:

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Step-by-step explanation:

Cross Multiply

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Answer:

At the end of the 4th round

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Step-by-step explanation:

Put in a value for x for both equations

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The first thing I did was to be a part of the world, and the other is a great way to get the best out of the way, and I have to say that I am not a fan of the
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If 35 liters of petrol cost $21.00, what is the price per liter?

Answers

Step-by-step explanation:

if 21 dollars = 35 liters

the ? dollars = 1 litre

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:



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Answers

Answer:

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Step-by-step explanation:

the question can be rephrased as '4780 is five percent of what number'?

we can use the ratio of 'is/over' = %/100 to solve

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now cross-multiply:

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I need these answers for a worksheet I have and I would appreciate it if someone would help me out.
Question 1. You can combine like terms to ________ an expression.

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Answers

you can combine like terms to SIMPLIFY an expression.

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Answer:

Please give Brainliest!

Step-by-step explanation:

The three sides are 36ft, 72ft, and 59 ft.

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Answer:

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Step-by-step explanation:

WILL GIVE BRAINLIEST IF UR RIGHTTT!

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Answer:

[tex]-\sqrt{5\\}[/tex]

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Question 2: 8/4 = 2 & 12/4 = 3.

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Answer:

PROOF FOR THE "PROVE" SECTION:

As linear pairs, angle 2 and 3 are supplementary to each other. Angle 1 is equal to angle 2, as they are both same-side interior angles. Therefore, angle 1 and angle 3 are also supplementary.

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Answers

Answer:

See image

Step-by-step explanation:

Use Pythagorean Theorem

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See image

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Answers

[tex]\huge \bf༆ Answer ༄[/tex]

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Answers

Answer:

k = 9

Step-by-step explanation:

Consider the pattern on the right side , that is

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Answers

Answer:

B)

Step-by-step explanation:

10/5 + 4(72 - 6)

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Step-by-step explanation:

Step-by-step explanation:

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Answer:

answer attached: x = 5√2

Step-by-step explanation:

Answer:

Step-by-step explanation:

All of the right triangles are similar. This means ...

  long side / short side = x/2 = 25/x

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_____

Additional comment

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(a) Round off 3.612 and 29.87 to 2 significant figures.
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Answers

A)

3.612 = 3.6
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B)

3.6/30= 0.12

Easy method to do this:
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Step-by-step explanation:

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Step-by-step explanation:

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262144

Step-by-step explanation:

Hope I was able to help you with your question , have a great day :)

Answer:

Step-by-step explanation:

I think 8 to the power of 6 Is 262144

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Step-by-step explanation:

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[-5, 5]

Step-by-step explanation:

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Answers

[tex]6 \times (3 + 8) \\ = (6 \times 3) + (6 \times 8)[/tex]

Answer:

(6×3)+(6×8)

Hope you could get an idea from here.

Doubt clarification - use comment section.

Answer as a each as an algebraic expression.

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Answer:

is saying the half of q is 9 so you have to find out the value of q and when you find out the value for example x=18 the half of 18 is 9 I don't know if you undertand my explication

Step-by-step explanation:

18 the half of 18 is 9 because 9+9=18

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