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In-s [12.5K]
3 years ago
6

What is the first 3 questions

Mathematics
2 answers:
ad-work [718]3 years ago
6 0
Can you please tell me what the numbers are?
slava [35]3 years ago
4 0
More information is needed to answer this question. 
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Find sin 2a and cot 2a:
geniusboy [140]

Answer:

sin(2\alpha )=2(\frac{5}{12})(\frac{12}{13})=\frac{10}{13}\\cot(2\alpha ) = \frac{16511}{18720}

Step-by-step explanation:

\text{if } cos(\alpha)=\frac{12}{13}\\\text{That must mean we have a triangle with base 12, and hypotenuse 13.}\\\text{Using Pythagoras, we can determine the base of the triangle must be 5.}\\a^2+b^2=c^2 \text{, where c is the hypotenuse and a, b are the two other sides.}\\c^2-b^2=a^2\\\sqrt{c^2-b^2}=a\\\sqrt{13^2-12^2}=\sqrt{169-144}=\sqrt{25}=5\\\text{Therefore, }sin(\alpha) = \frac{5}{12}\\sin(2\alpha)=2sin(\alpha )cos(\alpha)\\\text{(From double angle formulae identities)}\\

sin(2\alpha )=2(\frac{5}{12})(\frac{12}{13})=\frac{10}{13}\\cos(2\alpha )=cos^2(\alpha)-sin^2(\alpha)\\cos(2\alpha )=(\frac{12}{13})^2-(\frac{5}{12})^2=\frac{16511}{24336}\\cot(2\alpha)=\frac{cos(2\alpha)}{sin(2\alpha)}=\frac{\frac{16511}{24336}}{\frac{10}{13}}=\frac{16511}{18720}

8 0
3 years ago
An experiment consists of tossing a coin and drawing a card, with the card- drawing stage dependent on the results of the coin t
Mnenie [13.5K]

Answer:

52 is the size of the sample space of this two-stage experiment

3 0
2 years ago
What is the surface area of a cube that measures 5 inches on each side?
Kryger [21]

Answer:

150 in²

Step-by-step explanation:

5 x 5 x 6 = 150

surface area of cube is 6 times (6 congruent faces) of one face. 5 x 5 = 25

25 x 6 = 150

5 0
3 years ago
Plz help me well mark brainliest if correct!!...
IRISSAK [1]

Answer:

A/5

Step-by-step explanation:

There are 2 people after 5 in the the 4| part and 3 under 6 in the 5| part.

5 0
2 years ago
Ndjdjjxjxjdjfjfjdjjdfjfj
Norma-Jean [14]

Answer:

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Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
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