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gladu [14]
3 years ago
9

Helpp!!! This is due Sunday. I don’t understand!

Mathematics
1 answer:
Darya [45]3 years ago
6 0

Answer:

11, 15, 26, 41, could be an answer


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The height of a radio tower is 400 ​feet, and the ground on one side of the tower slopes upward at an angle of 10degrees. ​(a) H
Anettt [7]

Answer:

  (a)  412 ft

  (b)  276 ft

Step-by-step explanation:

Consider the attached diagram.

(a) The internal angle of triangle RBT at B is 90° -10° = 80°. Since we know lengths RB and BT, we can find the length RT using the law of cosines:

  RT² = RB² +BT² -2·RB·BT·cos(80°) = 190² +400² -2·190·400·cos(80°)

  RT² ≈ 169,705.477

  RT ≈ √169,705.477 ≈ 411.95

The guy wire to the hillside should be about 412 feet long.

__

(b) The Pythagorean theorem can be used to find the shorter wire length.

  LM² = LB² +MB²

  LM = √(190² +200²) = √76,100

  LM ≈ 275.86

The guy wire to the flat side should be about 276 feet long.

4 0
3 years ago
Sin theta = 24/25, cos theta > 0, Find cos(2theta)
Norma-Jean [14]
Well... you don't necessarily need to get the cosine value, in order to get the double angle

\bf \textit{Double Angle Identities}
\\ \quad \\
sin(2\theta)=2sin(\theta)cos(\theta)
\\ \quad \\\\
cos(2\theta)=
\begin{cases}
cos^2(\theta)-sin^2(\theta)\\
\boxed{1-2sin^2(\theta)}\\
2cos^2(\theta)-1
\end{cases}
\\ \quad \\\\
tan(2\theta)=\cfrac{2tan(\theta)}{1-tan^2(\theta)}\\\\
-------------------------------\\\\
cos(2\theta )=1-2sin^2(\theta )\qquad \qquad  sin(\theta )=\cfrac{24}{25}
\\\\\\
cos(2\theta )=1-2\left( \cfrac{24}{25} \right)^2\implies cos(2\theta )=-0.8432
4 0
3 years ago
Read 2 more answers
(y4 – y3 + 2y2 + y – 1) ÷ (y3 + 1)
Svetradugi [14.3K]
 FIRST (y x 4 - y x 3 + 2y x 2 + y -1) / (y x 3 + 1) 
SECOND (4y-3y+4y+y-1) / (3y+1) 
THIRD (6y-1) OVER (3y+1) 

3 0
2 years ago
5/4q = 1/3 -2/3 + 2 help please
KengaRu [80]

Answer:

q=4/3

Step-by-step explanation:

simplify the right side, to 5/3

5/4q=5/3

multiply 4/5 on both sides

q = 5/3*4/5

q = 4/3

4 0
1 year ago
I need help! I need to know how to do the work and what the answer is plzzz
tangare [24]

Answer:

36 ft

Step-by-step explanation:

So the proportion of the big triangle is 48:4 or 12:1. So if the small triangle’s height is 3 feet, then 3*12 is 36 feet.

7 0
3 years ago
Read 2 more answers
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