Math please help quick

Which of the following are identities? Check all that apply.
(Points : 2)
sin2x = 1 - cos2x

sin2x - cos2x = 1

tan2x = 1 + sec2x

cot2x = csc2x - 1

Question 4. 4. Which of the following equations are identities? Check all that apply.
(Points : 2)








Question 5. 5. The expression sinx(cscx - cotx cosx) can be simplified to _____.
(Points : 2)
sin2x

sin2x - cscx

cos2x

sinx - tanx

Question 6. 6. The expression (secx + tanx)2 is the same as _____.
(Points : 2)
sec2x + tan2x

sec2x + 2cscx + tan2x

1 + 2cscx

1 + 2tan2x + 2secx tanx

Question 7. 7. Which of the following would be an acceptable first step in simplifying the expression ?
(Points : 2)




tanx + sinx

Question 8. 8. All identities are equations, and all equations are identities.
(Points : 2)
True

False

Question 9. 9. Which of the following is an identity?
(Points : 2)
sin2x - cos2x = 1

csc2x + cot2x = 1

(cscx + cotx)2 = 1

sin2x sec2x + 1 = cot2x csc2x

Question 10. 10. Which of the following is not an identity?
(Points : 2)
cos2x cscx - cscx = -sinx

sinx(cotx + tanx) = secx

cos2x - sin2x = 1- 2sin2x

csc2x + sec2x = 1

  1. 👍
  2. 👎
  3. 👁
  1. Hey, there is a limit !
    I will do the first one, then you try the rest.

    Which of the following are identities? Check all that apply.
    (Points : 2)
    sin2x = 1 - cos2x
    I assume you mean sin^2 x not sin 2x
    This is the same as
    sin^2 x + cos^2 x = 1
    which IS an identity.

    sin^2x - cos^2x = 1 No way

    tan2x = 1 + sec2x
    sin^2 x/cos^2x = 1 + 1/cos^2 x
    is
    sin^2 x cos^2 x = 1 which is the same No way

    cot2x = csc2x - 1
    is
    cos^2 x/sin^2 x = 1/sin^2 x -1
    cos^2 x = 1 - sin^2 x
    cos^2 x + sin^2 x = 1 YES

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. SS

    Which of the following responsibilities are held by the federal government? Choose all that apply. (2 points) protecting national parks administering healthcare providing Social Security managing intercity traffic creating garbage

  2. Career planning

    Please help I dont know if im right? What are the building blocks of a personality? Select all that apply. (2 points) emotional qualities*******

  3. English 10

    Which of the following is a possible setting for works of American literary realism? CHECK ALL THAT APPLY! *a. American West *b. Post-Civil War South c. New England d. Gold Coast I think there is one more that needs to be check,

  4. math

    If two quantities vary directly, which must be true of a graph showing the relationship between them? Select all that apply. A. The graph is a curve. B. The points on the graph are connected. C. The graph increases from left to

  1. English

    For questions 7-10, identify the type of noun underlined in each sentence. 7. The AZTECS made sacrifices to their gods. (2 points) Select all that apply. Common. Proper. Compound. Collective. 8. A SWARM of insects surround the

  2. social studies 8th

    1. Which of the following was a cause of the Great Depression? (Choose all that apply.) (3 points) the Stock Market Crash of 1929 Prohibition Failed crops and drought A lack of demand for goods 2. What was the impact of the boll

  3. trigonometry

    if sin2x=3sin2y, prove that: 2tan(x-y)=tan(x+y) ( here, in sin2x, 2x is an angle., like there's a formula:sin2x=2sinxcosx and sin2y=2sinycosy; ....)

  4. Trigonometry

    Simplify the expression using trig identities: 1. (sin4x - cos4x)/(sin2x -cos2x) 2. (sinx(cotx)+cosx)/(2cotx)

  1. algebra 1

    Which of the following points are solutions to the system of inequalities shown below? Check all that apply. y>4x + 2 y

  2. history

    which jobs did john bell hood have in the civil war? select all that apply. 2 points 1.leading texas soldier into battle******* 2.recruiting and training footing soldiers******** 3.defending confederate lands 4.making plans to

  3. English Check

    1. (Points: 2) The lawyer had been involved in several (elicit, illicit) activities. b. illicit 2. (Points: 2) When people (emigrate, immigrate), they move into a country. b. immigrate 3. (Points: 2) Several (incidence, incidents)

  4. SOCIAL STDIES HELP!

    5. Which of the following is true about the Atlanta Riot of 1906? (Choose all that apply.) (2 points) A mob attacked African Americans in downtown Atlanta.*** Blacks began the riot in white neighborhoods. It eventually led to

You can view more similar questions or ask a new question.