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valkas [14]
2 years ago
13

Help with Trigonometric identities

Mathematics
1 answer:
Gre4nikov [31]2 years ago
3 0

Answer:

Option 2

Step-by-step explanation:

Since theta is in the third quadrant, the sine of theta is negative.

By the Pythagorean identity,

\sin \theta=-\frac{\sqrt{105}}{13}

So, using the double angle formula for sine, we get that

\sin 2\theta=\frac{16\sqrt{105}}{169}

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Find the value of x and y so that both proportions will be correct:
andrew11 [14]

The values of x and y are 0.2 and 0.4 respectively.

<em><u>Explanation</u></em>

The given proportions are.....

x: 1\frac{2}{3}=y: 3\frac{1}{3} and y:1.5=0.2:0.75

From the second proportion, we will get....

y:1.5=0.2:0.75\\ \\ \frac{y}{1.5}=\frac{0.2}{0.75} \\ \\ 0.75y=0.2*1.5\\ \\ 0.75y=0.3\\ \\ y=\frac{0.3}{0.75}=0.4

Now, we will plug this y=0.4 into the first proportion. So we will get....

x: 1\frac{2}{3}=y: 3\frac{1}{3}\\ \\ x: \frac{5}{3}=0.4:\frac{10}{3} \\ \\ \frac{x}{\frac{5}{3}}= \frac{0.4}{\frac{10}{3}}\\ \\ \frac{3x}{5}=\frac{1.2}{10}\\ \\ 30x=6\\ \\ x= \frac{6}{30}=0.2

So, the values of x and y are 0.2 and 0.4 respectively.

6 0
3 years ago
Please review the image for the question
Flura [38]

Answer: y=1/3x^2-8/3x+10/3

Step-by-step explanation:

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3 years ago
How do you simplify radical 32
EleoNora [17]
\sqrt{32}=  \sqrt{16*2}= \sqrt{16}* \sqrt{2}=4 \sqrt{2}
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3 years ago
Tamika wants to double the volume of a square pyramid. What should she do?
ella [17]
To efficiently double the volume of a square pyramid, you need to double the height of the pyramid. 

<span>V = (1/3)Ah where A is the area of the base. If you double the height and leave A unchanged, the volume will also be doubled (replace h with 2h in the formula).</span>
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Read 2 more answers
3x + y = 6<br>4x + 2y = 8​
Lilit [14]

Answer:

x=2 y = 0

Step-by-step explanation:

good luck

3 0
3 years ago
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