Post a New Question

Math

posted by .

tan(x)=5 sin(x) for interval -π < x < π

  • Math -

    tan(x)=sin(x)/cos(x)

    sin(x)/cos(x)=5sin(x) Divide withsin(x)

    1/cos(x)=5

    1=5*cos(x) Divide with 5

    cos(x)=1/5

    cos(x)=0.2

    OR

    1/cos(x)=5

    sec(x)=5

  • Math -

    The only choices were A) 0, 1.571 B) -1.571, 0, 1.571 C) -1.369, 0, 1.369 D) 0, 1.369

  • Math -

    tan(0)=0
    sin(0)=0

    tan(0)=5*sin(0)

    0=0

    arccos(0.2)=1.3694384 radians

    tan(-alpha)= -tan(alpha)

    sin(-alpha)= -sin(alpha)

    tan(-1.3694384)=5 sin(-1.3694384)

    Answer C) C) -1.369,0,1.369 is correct

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    Evaluate *Note - We have to find the exact value of these. That I know to do. For example sin5π/12 will be broken into sin (π/6) + (π/4) So... sin 5π/12 sin (π/6) + (π/4) sin π/6 cos π/4 + cos …
  2. Math integrals

    What is the indefinite integral of ∫ [sin (π/x)]/ x^2] dx ?
  3. Math

    Write an equation of the tangent function with period (3π)/8, phase shift -π/5, and vertical shift -2. a. y=tan((8x)/3 - (8π)/15) -2 b. y=tan((8x)/3 + (8π)/15) -2 c. y=tan((16x)/3 +(3π)/80) -2 d. y=tan((8x)/3 …
  4. Precalculus

    Use one of the identities cos(t + 2πk) = cos t or sin(t + 2πk) = sin t to evaluate each expression. (Enter your answers in exact form.) (a) sin(19π/4) (b) sin(−19π/4) (c) cos(11π) (d) cos(53π/4) …
  5. Trig Help!

    Question: Trying to find cos π/12, if cos π/6 = square root 3 over 2, how to find cos π/12 using DOUBLE angle formula?
  6. Trigonometry

    IM STUCK ON THESE :( 1. What is the equation for shifting the standard sine curve +2 units horizontally?
  7. Calculus

    How do I find the critical values? y= 4/x + tan(πx/8) What I did is I simplified it to y= 4x^-1 + tan(πx/8) then I took the derivative y'= -4x^-2 + (π/8)(sec(πx/8))^2 Then I simplied it y'= -4/x^2 + (π/8)(sec(πx/8))^2
  8. Math, please help

    Which of the following are trigonometric identities?
  9. Precalc/Trig

    Sorry there are quite a few problems, but I just need to know if these are correct (and if they aren't, where I went wrong): 1. Solve these equations. tanθ = -√3 θ = 2π/3 + kπ θ = 5π/3 + kπ …
  10. precalc

    Given that sec 3π/10 ≈ 17/10 and csc 3π/10 ≈ 17/14, find the following: 1. sin 3π/10 ≈ 14/17 (is this one correct) 2. csc 43π/10 ≈ 3. sec 2π/10 ≈ 4. cot -12π/10 ≈ 5. …

More Similar Questions

Post a New Question