kleathers97
31.01.2020 •
Mathematics
Solve 2cos2x + cosx − 1 = 0 for x over the interval [0, 2pi ).
Solved
Show answers
More tips
- A Auto and Moto How to Deregister a Car in Moscow?...
- F Food and Cooking How to Cook Julienne? Recipes and Tips...
- D Dating, Love, Relationships 10 Useful Tips on How to Survive a Breakup?...
- F Food and Cooking Apple Cider Vinegar: The Ultimate Health and Beauty Solution...
- C Computers and Internet Е-head: How it Simplifies Life for Users?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
Answers on questions: Mathematics
- M Mathematics How can you use multiplication and subtraction to check your answer...
- M Mathematics In the 2012 presidential election, exit polls from the critical state of Ohio provided the following results: Total Obama Romney Non college degree (60%) 52% 45%...
- M Mathematics Bob can go to work by one of four modes of transportation: 1.) bicycle, 2.) car, 3.) bus and 4.) train. If he takes his bicycle, Bob has a 25% chance of getting...
- M Mathematics The People of California are collecting food cans, their goal is 2,000 cans, after 10 days they ve got 800 cans, what is the percent of the cans they got....
- M Mathematics The base of a solid is a circle with radius 7. The cross-sections of the solid perpendicular to afixed diameter of the base are squares.If the circle is centered...
- M Mathematics Average Earnings of Workers The average earnings of year-round full-time workers 25–34 years old with a bachelor’s degree or higher were $58,500 in 2003. If the...
- M Mathematics What does the term expand mean in mathematics? I am NOT searching for expanded form or distribute ....
- M Mathematics A Store has 8 fish tanks that each have 40 liters of water. What is the total number of liters of water in all of the fish tanks?...
- M Mathematics What is the equation of the following line? Be sure to scroll down first to see all answer options....
- M Mathematics The pictures to the right show how much sausage and pepperoni pizza was left at the end of one day which fraction represents how much more sausage pizza and pepperoni...
Ответ:
2cos^2x+cosx-1 = 0
2cos^2x + 2cosx - cosx - 1 = 0
(2cos^2x + 2cosx) - (cosx + 1) = 02cosx(cosx + 1) - 1(cosx + 1) = 0
(cosx + 1)(2cosx - 1) = 0
cosx+1 = 0 or 2cosx-1 = 0cosx+1 = 0 gives cosx = -1, x = PI
2cosx-1 = 0 gives cosx = 1/2, x = PI/3 or x = 5PI/3
x = PI/3 or x = PI or x = 5PI/3Ответ:
which question are u talking about