1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DENIUS [597]
2 years ago
5

Can someone help with number 4. I will reward brainliest.

Mathematics
2 answers:
viva [34]2 years ago
7 0

<u>Let's simplify the problem down a little</u>:

 ⇒ set 'sin(θ)' as x

    ⇒ the new equation looks like: 2x^2+5x-3=0

<u>Now let's solve this equation as a quadratic</u>:

 2x^2+5x-3=0\\(2x-1)(x+3)=0\\\\2x-1=0\\x = \frac{1}{2} \\\\x+3 = 0\\x=-3

<u>Now set the x value of '1/2', to sin(θ)</u>

  • <em>it can't be -3, because trig functions can't equal a negative number</em>

         sin(θ) = 1/2

            θ = π/6, <em>which is between the range given</em>

<u>Answer: π/6</u>

Hope that helps!

liraira [26]2 years ago
5 0

Answer:

theta = pi/6 and

theta = 5pi/6

Step-by-step explanation:

see image. Factor the expression. Solve for sin theta. Then use a calculator or unit circle to solve for theta. See image.

You might be interested in
Compare the following ratios: (Use &gt;, &lt; or = sign in the place holders)
Zepler [3.9K]

Answer:

7. 2:3<__4:1

8. 1:2<__3:6

9. 3:5>__2:4

10. 6:7>__4:8

Step-by-step explanation:

4 0
3 years ago
Write a ratio for each situation 310 beats per minute
MakcuM [25]

The obvious one is (310 beats)/(1 minute).

4 0
3 years ago
Find the cost of painting a cubical block of side length 3.2 cm, if painting costs $5 per cm2.
SashulF [63]
<h3><u>Answer</u>:- </h3>

\longrightarrow \sf \$ \: 307.2

<h3><u>Solution:-</u></h3>

Since painting is done on outer surface of cubical block we will have to find its surface area which is given by-

\green{ \underline { \boxed{ \sf{Surface \: area  \:of  \:Cube = 6a^2}}}}

  • <u>where a is side of the cube </u>

\begin{gathered}\\\quad \sf Surface \: area  \:of  \:Cube = 6\times(3.2)^2  \\\end{gathered}

\begin{gathered}\\\implies \quad \sf  6\times 3.2\times3.2   \\\end{gathered}

\begin{gathered}\\\implies \quad \sf  61.44 cm^2  \\\end{gathered}

Now,

\maltese \sf Cost  \:of  \:painting \: 1 \: cm² = \$ 5

\sf Cost \: of \: painting \: 61.44  \:cm²=61.44×5

\sf\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad=\$ 307.2

\leadstoThus it would cost $ 307.2 to paint the entire cubical block.

3 0
2 years ago
Shade 50% of this figure, worth 16 points
KATRIN_1 [288]

Answer:

shade 10 boxes for 50%

Step-by-step explanation:

50%=50/100=1/2

1/2 of 20=10

:. To shade 50% of the boxes, 10 boxes need to be shaded

6 0
3 years ago
What conversion factor would you use to solve the problem 37in=_ft
Yakvenalex [24]
1 foot = 12 inches

Conversion factor is 12
7 0
3 years ago
Read 2 more answers
Other questions:
  • Use a ratio to compare the values. Simplify the ratio<br>5m to 100cm
    5·1 answer
  • Kevin's work for deriving the equation of a circle is shown below. x2 + 4x = −(y2 − 20) step 1 x2 + 4x = −y2 + 20 step 2 x2 + 4x
    13·1 answer
  • Which expression represents five times the quotient of two numbers
    14·1 answer
  • If I work 52 weeks a year and make $10 an hour with 30 hours per week, what is my year to date GROSS earnings(before taxes &amp;
    5·1 answer
  • The Booster Club voted on
    10·1 answer
  • A direct variation function contains the points (–8, –6) and (12, 9). Which equation represents the function?
    10·2 answers
  • Brian budgeted $1,000.00 for a new computer. Will give brainly and extra points
    13·2 answers
  • A drought effects 9 out of 12
    14·2 answers
  • Solve |x| &gt; -9.<br><br> 1. no solution<br> 2. all reals<br> 3. {x | x &lt; -9 or x &gt; 9}
    7·2 answers
  • Determine if you UTV and RQS are similar if so right the similarities statement
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!