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nikklg [1K]
3 years ago
14

Trig. help. How does

29%20%3D%20sinx" id="TexFormula1" title="2sin (\frac{1}{2} x)cos( \frac{1}{2} x) = sinx" alt="2sin (\frac{1}{2} x)cos( \frac{1}{2} x) = sinx" align="absmiddle" class="latex-formula"> ?
Mathematics
1 answer:
kotegsom [21]3 years ago
5 0
Recall that 2sin(x) cos(x) is actually equal to sin(2x).

We can prove this by expanding sin(2x) to sin(x + x).
sin(x + x) = sin(x) cos(x) + cos(x) sin(x) = 2sinxcosx

Thus, 2sin(x/2)cos(x/2) can be rewritten in the form:
sin(2x/2), and this simplifies down to sinx.
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Answers plz<br> i don’t get it
masha68 [24]
The third option has the highest value
3 0
3 years ago
Hello can you please help me posted picture of question
dsp73
The correct answer to your question is 6, option B.

The degree of a polynomial is the highest exponent or power of the variable that is involved in the expression. In the above question we have only one variable which is x, and from the given terms we can see that the highest power of x is 6. So the degree of polynomial is 6. The degree of polynomials helps us to know about the end behavior of the graph.
6 0
4 years ago
Easy but i'm confused yikes. (picture attached)
kirill115 [55]

Answer:

The second answer

Step-by-step explanation:

P'Q'R' is simply rotating PQR 90 degrees, it does not change the angle that it makes

8 0
3 years ago
Read 2 more answers
a jar contain 50 marbels of which is blue or red if 35 of marbels are red which of the following does not represent the ratio of
iris [78.8K]
35 = red

35 : 50 = 7 : 10

the ratio is should be 7 out of 10
6 0
3 years ago
Reflection over the y-axis followed by a horizontal translation 1 unit left on the equation f(x)=x ​
aleksley [76]

Answer:

f(x) = -x -4 or f(x) = (-x)-4

Step-by-step explanation:

Let the graph of g be a translation of 4 units down followed by a reflection in the y-axis of the graph of f(x)=x. Write a rule for g.

Transformations can be found using this general formula: f(x) = a(bx-h)+k

For this question, we want a translation down as well as a reflection.

The two values we need to use are for k, a vertical translation, and b, a reflection over the y-axis.

Since we are translating down 4 units, k = -4

Since we are reflecting across the y-axis, b = -1

So, f(x)=(-x)-4

or

f(x)= -x -4

6 0
3 years ago
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