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Debora [2.8K]
3 years ago
13

Find the exact value of sin 105º.

Mathematics
2 answers:
NARA [144]3 years ago
7 0
Value is 1
(according to my calculator)
Jet001 [13]3 years ago
4 0

Answer:

sin 105 = sin (45 + 60) = sin 45 cos 60 + cos 45 sin 60, or

                                    = (1 / √2)(1 / 2)        + (1 / √2)(√3 / 2)

                                         1 + √3

                                    = -------------

                                           2√2

Step-by-step explanation:

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Solve this system of linear equations. Separate
amid [387]

Answer:

the answer is 396 beacsue i followed yiur instucton on the note answer.

Step-by-step explanation:

3 0
3 years ago
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What is the area of this figure?<br><br> A. 102<br> B. 132<br> C. 168<br> D. 340
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Just simply use the calculation of a trapazium.
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4 0
3 years ago
At the zoo, there were 260 people at the panda exhibit. 30% of the people at the panda exhibit were visitors from China. How man
kondaur [170]

First we convert percentage to a decimal:

30\%= \cfrac{30}{100}= \cfrac{3}{10}

Then we multiply the decimal and a number:

\cfrac{3}{10}\cdot260=\cfrac{3\cdot\not\!\!\!260^\ {26}}{\not\!\!10}=3\cdot26= \boxed{78}

Answer:

There were 78 visitors from China.

6 0
3 years ago
Horatio is solving the equation -3/4+2/5x=7/20x-1/2. Which equations represent possible ways to begin solving for x? Check all t
trapecia [35]

Answer:

  • 2/5x=7/20x+1/4
  • -3/4=-1/20x-1/2
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Step-by-step explanation:

If you add 3/4 to both sides of the equation, you get ...

... 2/5x = 7/20x + 1/4 . . . . first choice

If you subtract 2/5x from both sides of the equation, you get ...

... -3/4 = -1/20x -1/2 . . . . third choice

If you subtract 7/20x from both sides of the equation, you get ...

... -3/4 +1/20x = -1/2 . . . . last choice

Choices 2 and 4 are erroneous versions of choices 1 and 3, so do not apply.

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3 years ago
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Transform the equation 2x^2 + 4xy + 5y^2 - 4x - 22 to parallel axes<br> through (-2,3).
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Answer:

I think you are happy with answer

5 0
3 years ago
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