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
Mandarinka [93]
3 years ago
11

Which angle has a sine of -1/2 and a cosine of -√3/2

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
8 0
\sin x=-\dfrac{1}{2} < 0\\\\\cos x=-\dfrac{\sqrt3}{2} < 0\\\\therefore\ x\in(180^o;\ 270^o)

\text{We know:}\ \tan x=\dfrac{\sin x}{\cos x}\\\\\text{therefore:}\ \tan x=\dfrac{-\frac{1}{2}}{-\frac{\sqrt3}{2}}=\dfrac{1}{2}\cdot\dfrac{2}{\sqrt3}=\dfrac{1}{\sqrt3}\cdot\dfrac{\sqrt3}{\sqrt3}=\dfrac{\sqrt3}{3}

\tan x=\dfrac{\sqrt3}{3}\Rightarrow x=30^o+180^o\cdot k;\ k\in\mathbb{Z}

x\in(180^o;\ 270^o)\ therefore\ \boxed{x=30^o+180^o=210^o}
You might be interested in
A person breathes 2.5 x 10^-4 in about cubic meters of air per second. How long does it take to breathe in 2.5 cubic meters of a
Ipatiy [6.2K]

Answer:

10⁴ seconds

Step-by-step explanation:

Given that,

A person breathes 2.5\times 10^{-4} in about cubic meters of air per second.

We need to find time taken to breathe 2.5 cubic meters of air.

In 1 sec = 2.5\times 10^{-4} m³ of air breathe

Let in x seconds, 2.5 m³ of air taken by the person.

x=\dfrac{2.5}{2.5\times 10^{-4}}\\\\x=10^4\ s

Hence, in 10⁴ seconds 2.5 m³ of air is taken by the person.

5 0
3 years ago
Find the equation of the line that passes through (-1,-3) and is perpendicular to
miv72 [106K]

Answer:

y = -2x - 5

Step-by-step explanation:

2y = x - 3

y = 1/2x - 3/2

gradient = 1/2

perpendicular gradient = negative reciprocal = -2

y = -2x + c

(-3) = -2(-1) + c

-3 = 2 + c

-5 = c

3 0
2 years ago
Read 2 more answers
If three friends posted 15 comments each, how many comments will there be overall?
soldi70 [24.7K]
15 times 3 equals  45 hoped i helped

4 0
3 years ago
Read 2 more answers
Find the slope(-1,-1),(2,-2)
Natali [406]

Answer:

\huge\boxed{slope=-\dfrac{1}{3}}

Step-by-step explanation:

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

Substitute the coordinates of the given points (-1, -1) and (2, -2):

m=\dfrac{-2-(-1)}{2-(-1)}=\dfrac{-2+1}{2+1}=\dfrac{-1}{3}=-\dfrac{1}{3}

5 0
3 years ago
Need help on this stastic and prob
sasho [114]

Answer:

it is correct they weigh the same

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Slope=2 passing through (-5,3)
    6·1 answer
  • What does 6t equal ?
    10·1 answer
  • There are 20 bicycles and 10 cars parked in the parking lot. Each bicycle had two wheels and each car had four wheels. How many
    7·2 answers
  • Why does 2+2=ddddddddddddddddddddddddddddddddddd
    7·2 answers
  • X-2y=4. -3x+5y=-3. solving linear systems using multiplication and addition show your work
    11·1 answer
  • what digit out of 1, 3,5, and 9 would complete the second factor so that the product will have 2 decimal places for 7.2 x 4.6___
    9·1 answer
  • A 16 oz. can of Creamy Corn sells for $1.09,
    15·2 answers
  • HELP PLSSSUAURUARGUWUEGWUWGS​
    11·2 answers
  • 46 x 53 please show with work or something
    6·1 answer
  • WHAT TIME IS A QUARTER TO SIX?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!