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Semenov [28]
3 years ago
9

What is the answer to this question?

Mathematics
1 answer:
melisa1 [442]3 years ago
7 0

Answer: I think it is negative.


Step-by-step explanation: When you add a negative to a negative you still have a negative.


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Find the exact value of cos(sin^-1(-5/13))
son4ous [18]

bearing in mind that the hypotenuse is never negative, since it's just a distance unit, so if an angle has a sine ratio of -(5/13) the negative must be the numerator, namely -5/13.

\bf cos\left[ sin^{-1}\left( -\cfrac{5}{13} \right) \right] \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{then we can say that}~\hfill }{sin^{-1}\left( -\cfrac{5}{13} \right)\implies \theta }\qquad \qquad \stackrel{\textit{therefore then}~\hfill }{sin(\theta )=\cfrac{\stackrel{opposite}{-5}}{\stackrel{hypotenuse}{13}}}\impliedby \textit{let's find the \underline{adjacent}}

\bf \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies \pm\sqrt{c^2-b^2}=a \qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ \pm\sqrt{13^2-(-5)^2}=a\implies \pm\sqrt{144}=a\implies \pm 12=a \\\\[-0.35em] ~\dotfill\\\\ cos\left[ sin^{-1}\left( -\cfrac{5}{13} \right) \right]\implies cos(\theta )=\cfrac{\stackrel{adjacent}{\pm 12}}{13}

le's bear in mind that the sine is negative on both the III and IV Quadrants, so both angles are feasible for this sine and therefore, for the III Quadrant we'd have a negative cosine, and for the IV Quadrant we'd have a positive cosine.

8 0
2 years ago
Two mechanics work on a car . The first mechanic worked 10 hours and the second mechanic worked for 15 hours. Together they char
bonufazy [111]

Answer:

110

Step-by-step explanation:

Let x = rate #1 and then 155-x=rate #2.

15x + 5(155-x) = 1225

15x - 5x + 775 - 1225

10x = 450

x = 45, second rate is 110

8 0
3 years ago
Read 2 more answers
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denis23 [38]
An isosceles triangle has two equal side lengths and the other side length is different. Therefore, possible measures of the other two sides are either 
22 cm and 27 cm,  or  22 cm and 24.5 cm. 
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3 years ago
Work out the volume of a cube of edge 4m
telo118 [61]
L*W*H , So 4*4*4, So therefore it would be 64 m3
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3 years ago
How do I solve for the area of a semi oval with measurements of 2cm on the bottom and 5cm on the side
Setler [38]

Answer:

yan po ang sagot ko(◍•ᴗ•◍)❤

Step-by-step explanation:

sana maka tulong ako

goodluck ❤️

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