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
Olenka [21]
3 years ago
8

Solve in radians help plz

Mathematics
1 answer:
PIT_PIT [208]3 years ago
5 0
I think we can use the identity  sin x/2  = sqrt [(1 - cos x) /2]

cos x -  sqrt3 sqrt ( 1 - cos x) /sqrt2 = 1

cos x - sqrt(3/2) sqrt(1 - cos x) = 1
sqrt(3/2)(sqrt(1 - cos x) =  cos x - 1   Squaring both sides:-
1.5 ( 1 - cos x) = cos^2 x - 2 cos x + 1

cos^2 x - 0.5 cos x - 0.5 = 0 

cos x = 1 , -0.5

giving x = 0 , 2pi, 2pi/3,  4pi/3  ( for  0  =< x <= 2pi)

because of thw square roots some of these solutions may be extraneous so we should plug these into the original equations to see if they fit.

The last 2 results dont fit so the answer is  x = 0 , 2pi Answer
You might be interested in
Please help asap! if you could also explain how you did it so I can answer the other questions by myself
Usimov [2.4K]

Answer:

Step-by-step explanation:

true

8 0
3 years ago
If 5 over 6 gallon covers 1 over 4 of the house then how much paint is needed for the entire house
MissTica
If 5/6 gallons covers a quarter of the house, then you would need 4 times as much paint:
\frac{5}{6}  \times 4
Which is 20/6 gallons or 3 and 1/3 gallons
Hope this helped
4 0
3 years ago
there are 12 players on the basketball roster. 9 of the players are in the 8th grade. What percent of the team is not in the 8th
alexandr402 [8]
Well there are 12 players and 9 are in 8th grade so the rest is leaving 3 so 3/12 so converted to percentage is 25% hoped this helped
3 0
2 years ago
Repost* Can someone plz help? :(
masha68 [24]

Answer:

2.5

Step-by-step explanation:

4*2.5= 10

8* 2.5=20

how i got 2.5 is by doing 10 divided by 4

5 0
2 years ago
Read 2 more answers
Suppose that in a large company, 30% of the computers are infected by adware. if 6 computers are randomly selected and tested, w
bazaltina [42]
It's either 1.8 or 0.9
6 0
3 years ago
Other questions:
  • What is the longest stick that can be placed within a box whose inside dimension are 24 inches, 30 inches, and 18 inches?
    15·1 answer
  • In the triangle below, what is the side opposite the 30 degree angle
    9·1 answer
  • Math help, BOTH of these please!
    9·2 answers
  • 31 is 20% of what number
    7·2 answers
  • In his free time, Gary spends 9 hours per week on the internet and 14 hours per week playing video games. If Gary has five hours
    13·1 answer
  • Is (2,10) a solution of the equation y=9x
    15·1 answer
  • Please help this is pretty easy. :) write the equation of the given line in standard form.
    12·1 answer
  • Can someone please help me?
    13·1 answer
  • PLEASE ANSWER QUICKLY..... giving out brainiliest
    7·2 answers
  • Given the legs of a right triangle are 8 and 4, what is the measure of the hypotenuse?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!