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
labwork [276]
2 years ago
8

Solve 1 + cos theta = 2 cos^2 theta

Mathematics
1 answer:
valentina_108 [34]2 years ago
8 0

~~~~1+ \cos \theta = 2 \cos^2 \theta \\\\\implies 2\cos^2 \theta -\cos \theta -1 = 0\\\\\implies 2 \cos^2 \theta -2\cos \theta + \cos \theta -1 = 0\\\\\implies 2 \cos \theta( \cos \theta -1) +(\cos \theta -1)=0\\\\\implies (\cos \theta -1)(2 \cos \theta +1)=0\\\\\implies \cos \theta = 1, ~~\cos \theta = -\dfrac 12\\\\\implies \theta = 2n\pi,~~~ \theta = 2n\pi \pm \dfrac{2\pi}3

You might be interested in
Find surface area of the trapizoid
Alina [70]

Answer:62

Step-by-step explanation:

4 0
3 years ago
Wesleys mother is 57 years old. her age is three years more than twice edwins age. what is wesleys age?
natita [175]

Answer: Edwin is likely a typo for Wesley.

Step by step:

Wmom=57

Wmom=3+2e

57=3+2e

54=2e

27=e

Edwin is 27 years old.

Aside from a typo, one can speculate on Wesley's age. He's likely between 20 and 39 years old based on his mother's age. If you want to delve into societal norms, Wesley is likely to be a name from a white middle to upper class parentage, so it's less likely he was had when his mother was a teen, or even in her early twenties because college, so move that age zone to 20 to 34. Then consider that having children later than 35 is consideration for a "risky" pregnancy and most women are urged to aim for before 33, but most upper middle class white women will be pressured to baby before 30. So, adjust Wesley's age zone to 27 to 34. And then...idk. But in all honesty I think Edwin is meant to be Wesley, because it's a math problem not a sociology one.

7 0
4 years ago
The measure of an exterior angle of an isosceles triangle is x percent. Write expressions representing the possible angle measur
Nutka1998 [239]

The measure of exterior angle of an isosceles triangle is x degrees . what are the possible angle measures of the triangle in terms of x ? describe all the possible values of x

6 0
3 years ago
What is the measure of the internal angle H' of the image in degrees
stepladder [879]

Answer:

40 degrees

Step-by-step explanation:

- All internal angles of a triangle add up to 180 degrees.

- A right angle is 90 degrees.

90+50=140

subtract 140 from 180, which is 40 degrees.

5 0
3 years ago
What did the policeman shout to the math professor as a mob of excited calculus students crowded around these displays on his gr
sladkih [1.3K]
I don't know, what did the policeman shout to the math professor as a mob of excited calculus students crowded around these displays on his graphing calculator?
4 0
3 years ago
Other questions:
  • 12 PTS; IF IT'S RIGHT I Promise BRAINLIST;5-STARS;THANKS; Beleive me it's simple I promise!!
    15·2 answers
  • C/4-5=4<br> btw c is over 4.<br> PLEASE HELP THE FIRST ANSWER WILL GET BRAINLIEST ANSWER!!!!
    5·2 answers
  • What is the value of the expression 3/8 divided by 1 and 1/2
    9·1 answer
  • A 12 ounce box of cereal costs $3.84, and a 48 ounce container of almond milk costs $5.76.
    15·1 answer
  • I'm struggling right now because I learned this but I completely forgot how to do it. I need to find the distance between two po
    11·1 answer
  • If right I’ll mark brainiest
    13·1 answer
  • Nakita bought items at a grocery store.  She bought 2 boxes of crackers for $3.50 each.  She used a coupon for $0.80 off the p
    6·1 answer
  • Write the equation of the following line in slope intercept The line passes through the point (-9, -2) and has a slope of
    11·1 answer
  • Need help understanding this!
    10·1 answer
  • What divided by 4.5 equals 16
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!