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
vredina [299]
3 years ago
15

How to find sine and cosine without a calculator unit circle?

Mathematics
1 answer:
sleet_krkn [62]3 years ago
4 0
You have to remember that formula. or look at the picture

You might be interested in
City there are 244,000 48-year-olds. Based on the table below how
ankoles [38]

Answer:

405

Step-by-step explanation:

It tells in the table.

3 0
2 years ago
Divide. Use​ place-value blocks or area models to help.
Shalnov [3]

Answer:

a 5,900÷90=65.5555555556

5 0
3 years ago
How many three digit numbers greater than 500 can you form using the digits 2 6 8 exactly once each
LenaWriter [7]
6^8x2  6x2^8 is all i can think of
6 0
3 years ago
Solve the equation 2cosA = 3tanA
zavuch27 [327]
\bf sin^2(\theta)+cos^2(\theta)=1\implies cos^2(\theta)=1-sin^2(\theta)
\\\\\\
tan(\theta)=\cfrac{sin(\theta)}{cos(\theta)}\\\\
-----------------------------\\\\

2cos(A)=3tan(A)\implies 2cos(A)=3\cfrac{sin(A)}{cos(A)}
\\\\\\
2cos^2(A)=3sin(A)\implies 2[1-sin^2(A)]=3sin(A)
\\\\\\
2-2sin^2(A)=3sin(A)\implies 2sin^2(A)+3sin(A)-2

\bf \\\\\\
0=[2sin(A)-1][sin(A)+2]\implies 
\begin{cases}
0=2sin(A)-1\\
1=2sin(A)\\
\frac{1}{2}=sin(A)\\\\
sin^{-1}\left( \frac{1}{2} \right)=\measuredangle A\\\\
\frac{\pi }{6},\frac{5\pi }{6}\\
----------\\
0=sin(A)+2\\
-2=sin(A)
\end{cases}

now, as far as the second case....well, sine of anything is within the range of -1 or 1, so -1 < sin(A) < 1

now, we have -2 = sin(A), which simply is out of range for a valid sine, so there's no angle with such sine

so, only the first case are the valid angles for A
8 0
3 years ago
To isolate the variable in the equation -3x - 9 = -27, the first step is to add 9 to both sides. This gives you -3x = -18. What
drek231 [11]
Divide both sides of the equation by -3, which gives you x=6.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Multiply by 3xyz²/6y^4 by 2y/xz^4
    14·1 answer
  • What is -9.0909 as a percentage?
    8·1 answer
  • What is the Scientific notation of 1,678,483.0043
    8·2 answers
  • By the Triangle Inequality Theorem which set of side lengths could create a triangle? A) 5, 10, 4 B) 5, 7, 13 C) 7, 9, 3 D) 10,
    6·2 answers
  • A rancher has 140 feet of fence with which to enclose three sides of a rectangular garden (the fourth side is a cliff wall and w
    7·1 answer
  • Divide 4.8 by 11 Plzzzz help by the end of the day I need help
    8·1 answer
  • What is the distance between the points (2, 10) and (-6, 4) on the coordinate
    6·2 answers
  • This does not make sense to me
    13·2 answers
  • Help please helppppp
    13·1 answer
  • Simplify each exponential expression using the properties of exponents and match it to the correct answer.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!