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Scrat [10]
3 years ago
13

What are all the measure if angles

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
8 0

360 is the total measurement of the angles


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Solve the equation on the interval [0, 2pi) <br><br> 2 cos^2 (theta/2) - 3 cos theta = 0
Ksivusya [100]
Hello : 
by idetity : 1+cos(2a) = 2cos²(a)
let : a = <span>θ/2
1+cos(2×</span>θ/2)=2cos²(θ/2)
1+cos(θ) = 2cos²(θ/2)
solve :  2 cos^2 (θ/2) - 3 cos(θ) = 0   ......(1)
(1) : 1+cos(θ)-3 cos(θ) =0
2cos(θ)  = 1 

cos(θ) = 1/2
in : [0, 2π<span>[ 
</span>( θ = π/3) or (θ = 5π/3)
3 0
3 years ago
Find the solutions of the quadratic equation –9x2 + 49 = 0.
Luba_88 [7]

Answer:

x = 7/3

Step-by-step explanation:

<u>Given equation:</u>

  • –9x² + 49 = 0

To determine the value of "x", we need to isolate the x-variable and it's coefficient on one side of the equation. This can be done by subtracting 49 to both sides of the equation.

  • ⇒ –9x² + 49 - 49 = 0 - 49
  • ⇒ –9x² = -49

We can see that the negative sign in on both sides of the equation. Remove it by dividing -1 to both sides of the equation.

  • ⇒ –9x² = -49
  • ⇒ -9x²/-1 = -49/-1
  • ⇒ 9x² = 49

Clearly, we can see that 9x² and 49 are perfect squares. Therefore,

  • ⇒ 9x² = 49
  • ⇒ (3x)² = (7)²

Take square root both sides of the equation:

  • ⇒ √(3x)² = √(7)²
  • ⇒ 3x = 7

To determine the value of "x", we need to isolate it "completely". This can be done by dividing 3 to both sides of the equation

  • ⇒ 3x/3 = 7/3
  • ⇒ x = 7/3

Therefore, the value of "x" must be 7/3.

3 0
1 year ago
7:45 A.M&gt; is what time in military time?
Black_prince [1.1K]
0745 legit is 7:45 in military time 
8 0
3 years ago
Read 2 more answers
NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by h ( t ) = − 4.
Fudgin [204]

Answer:

The rock splashes down when h(t) = 0. Set h(t) = 0 and solve for t using quadratic formula.

0 = − 4.9t^2 + 178t + 325

t = 38.07, -1.74

(Throw away the negative answer, since time can't be negative.)

t = 38.07 sec

Please Mark Brainliest If This Helped!

4 0
2 years ago
What is the volume of the rectangular<br> pyramid shown?<br> 22 yd.<br> 20 yd<br> 15 yd
borishaifa [10]

Answer:

C. <em>3,300</em>

<em />

Step-by-step explanation:

5 0
3 years ago
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