1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Jlenok [28]
3 years ago
5

Find the exact value of tan (arcsin (two fifths))

Mathematics
1 answer:
aev [14]3 years ago
5 0
There are 2 ways to do this:

1) Transform tan into terms of sin.
tan x = \frac{sin x}{cos x} = \frac{sin x}{\sqrt{1-sin^2 x}}
where sin x = sin(sin^{-1} (\frac{2}{5})) = \frac{2}{5}
Substituting back in gives:
tan x = \frac{\frac{2}{5}}{\sqrt{1-(\frac{2}{5})^2}} = \frac{\frac{2}{5}}{\sqrt{\frac{21}{25}}} = \frac{2}{5}*\frac{\sqrt{25}}{\sqrt{21}} = \frac{2}{\sqrt{21}}


2) Use a right triangle.
\theta = sin^{-1} (\frac{2}{5}) \\  \\ sin \theta = \frac{2}{5}
sin = opp/hyp --> opp = 2, hyp = 5
Use Pythagorean theorem to solve for adjacent side.
adj = \sqrt{5^2 - 2^2} = \sqrt{21}
tan = opp/adj
tan \theta = \frac{2}{\sqrt{21}}
You might be interested in
Identify the solution of the system of equation<br> 2x+4=0<br> Y=5-3x
nexus9112 [7]
2x+4=0\\&#10;y=5-3x\\\\&#10;2x=-4\\&#10;y=5-3x\\\\&#10;x=-2\\&#10;y=5-3x\\\\&#10;y=5-3\cdot(-2)\\&#10;y=5+6\\&#10;y=11\\\\&#10;x=-2,y=11
5 0
2 years ago
Read 2 more answers
Working alone, it takes Chelsea 13 hours
Tems11 [23]

Answer:

24 hours

Step-by-step explanation:

hoped this helped

7 0
3 years ago
The first term of an arithmetic sequence is -5, and the tenth term is 13. Find the common difference.
Sergeeva-Olga [200]
(A) 1.8

The difference is 18, 13 is bc the tenth term so divide 18 by 10 to get 1.8
7 0
3 years ago
Given: F(x) = x + 2 and G(x) = 3x + 5 (F - G) (x) = <br><br> 1) 4 <br> 2) -3x - 3<br> 3) -2x - 3
mamaluj [8]
This equation is telling you to subtract the value of f(x) from the value of g(x).


f(x)= x + 2
g(x) = 3x + 5

so x + 2 - 3x -5 = -2x-3
4 0
3 years ago
The initial population of a town is 4000 and it grows with a doubling time of 10 years what will the population be in 12 years
Doss [256]
Population in 12 years ≈10, 108 people
4 0
2 years ago
Other questions:
  • Suppose that there is a coffee shop in an office(Which also has interns). It is observed that out of the people that visit the c
    9·1 answer
  • At a pizzeria, a medium pizza which has diameter of 12 inches sells for $6.00 and a large pizza which has a diameter of 16 inche
    8·1 answer
  • $5000 was invested into an investment that pays 4.25% simple interest. The total value of the investment amounted to $6593.75. H
    5·1 answer
  • What is -5/12 - 4/14 + 6/34
    8·1 answer
  • FILL IN THE BLANK
    12·2 answers
  • Write y=(-3/4)x+3 in standard form using integers
    7·1 answer
  • Helppp please reallly fasttt!!!
    14·1 answer
  • Ten Points
    7·1 answer
  • An office clerk earns $120 for two 4-hour work shifts. How much will she earn
    9·2 answers
  • Which shows the expression below simplified?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!