math

Solve:
tanx - 2sin2x = 0
0°< or equal to x < 360°

  1. 👍
  2. 👎
  3. 👁
  1. x = 0 is one obvious solution.

    (sinx/cosx - 2 sin x cosx)= 0
    sinx - 2 sinx cos^2x = 0
    sinx - 2 sinx(1- sin^2x) = 0
    2 sin^2x + sinx = 0
    sinx(2 sinx +1) = 0
    sinx = 0 or -1/2

    x = 0, 180, 210 or 330 degrees

    1. 👍
    2. 👎
  2. how did you get 210 and 330? =S

    1. 👍
    2. 👎
  3. nevermind, i understand!

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra 2

    The formula A = 180(n-2)/n relates to the measure A of an interior angle of a regular polygon to the number of sides n. If an interior angle measures 120 degrees, find the number of sides A)5 B)6 C)8 D)10 I have NO clue on how to

  2. math

    solve the equation for the range zero degrees less than or equal to theta less than or equal to 360 degrees. 4 sin 0=-1

  3. algebra

    Your goal is to save at least $360.00 over the next 6 weeks. How much money must you save each week in order to meet that goal? Write and solve an inequality. A. 6 + x ≥ 360; x ≥ 354 B. 60x ≤ 360; x ≤ 10 C. x over 6 ≤

  4. 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

  1. math trigonometry

    Simplify the following expression to a single trigonometric term sin(360-x)*tan(-x)/cos(180 x)*(sin^2A cos^2A) answer= -sinx*-tanx/cosx*(1) after that how do i continue?

  2. AP Calculus

    If y= tanx, x=pi, and dx= .5, what does dy equal? a)-.25 b) -.5 c) 0 d).5 e).25

  3. mathematics

    how do you solve: √3 tan^2x - (1+√3) tanx + 1 = 0

  4. Math/Trig

    Solve: 2 sin x - 1 = 0 for 0 degrees is less than or equal to x is less than 360 degrees.

  1. trigonometry

    solve the equation: 4 tan^2 x + 12 sec x +1 =0, for 0 degrees is less than or equal to x is less than or equal to 360 degrees.

  2. Maths - trig

    Solve 3cos2x - 7cosx = 0, when 0

  3. Math

    How do I solve this? tan^2x= 2tanxsinx My work so far: tan^2x - 2tanxsinx=0 tanx(tanx - 2sinx)=0 Then the solutions are: TanX=0 and sinX/cosX = 2 sin X Divide through by sinX: we have to check this later to see if allowed (ie sinX

  4. inverse trig HELP PLEASE!!

    Write the general solution to y = arcsin (0.6428). 40°±360°k 140°±360°k 220°±360°k 320°±360°k How do I find the right answer? I am like seriously stuck. I need help please.

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