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Andreas93 [3]
3 years ago
10

Select the appropriate inequality symbol to make the number sentence true.

Mathematics
2 answers:
Zolol [24]3 years ago
8 0
It’s not equal it’s the one on the left
Serggg [28]3 years ago
7 0

Answer:

=

Step-by-step explanation:

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Number of Cans
Ainat [17]

Answer:

d.25 that is the answer of the question

5 0
3 years ago
Sinx + siny=a<br> cosx + cosy=b<br> Find cos(x+y/2)
romanna [79]

Using the addition rule of the Sine function and the Cosine function, we obtain \cos\dfrac{x+y}{2}=\dfrac{b}{\sqrt{a^2+b^2}}.

<h3>What are the formulas for (sin x + sin y) and (cos x + cos y)?</h3>
  • The formula for the addition of two Sine functions (\sin x+\sin y) is \sin x + \sin y = 2\sin\frac{x+y}{2}\cos\frac{x-y}{2}.
  • The formula for the addition of two Cosine functions (\cos x+\cos y) is \cos x + \cos y = 2\cos\frac{x+y}{2}\cos\frac{x-y}{2}.

Given that

\sin x + \sin y = a\\\cos x + \cos y = b

Then using the above formulas, we get:

2\sin\frac{x+y}{2}\cos\frac{x-y}{2}=a       (1)

2\cos\frac{x+y}{2}\cos\frac{x-y}{2}=b       (2)

Dividing the equation (1) by (2), we get:

\dfrac{\sin\dfrac{x+y}{2}}{\cos\frac{x-y}{2}}=\dfrac{a}{b}\\\Longrightarrow \tan\dfrac{x+y}{2}=\dfrac{a}{b}             (3)

Now, we know that  \cos\theta=\dfrac{1}{\sqrt{1+\tan^2\theta}}.

Thus, using the above formula, we get from (3):

\cos\dfrac{x+y}{2}=\dfrac{1}{\sqrt{1+\tan^2\dfrac{x+y}{2}}}\\\Longrightarrow \cos\dfrac{x+y}{2}=\dfrac{1}{\sqrt{1+\dfrac{a^2}{b^2}}}\\\Longrightarrow \cos\dfrac{x+y}{2}=\dfrac{b}{\sqrt{a^2+b^2}}

Therefore, using the addition rule of the Sine function and the Cosine function, we obtain \cos\dfrac{x+y}{2}=\dfrac{b}{\sqrt{a^2+b^2}}.

To know more about Sine and Cosine functions, refer: brainly.com/question/27728553

#SPJ9

3 0
2 years ago
Whats -6x+3y=9 graphed
inn [45]
This is -6x+3y=9 graphed

5 0
3 years ago
The length of the major axis of the ellipse below is 10. What is the sum of the
BARSIC [14]

Answer:

10

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
7(-2 - 5n) solve<br>how do you do this equation can you help me please?​
Shkiper50 [21]

Answer:

-14-35n

Step-by-step explanation:

First do distributive property and you multiply 7 by -2 and by -5n

5 0
4 years ago
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