trig

posted by .

1-2sin^2(2x)

  • trig -

    isn't this a difference of two squares?

    I assume it all is equal to zero...

    (1-sqrt2*sin2x)(1+sqrt2*sin2x)=0
    solve for 2x, then x.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math (trig)

    Find sin(x/2) if sin(x)= -0.4 and 3pi/2 < or equal to (x) < or equal to 2pi Let's use cos 2A = 1 - 2sin 2 A and we can match cos x = 1 - 2sin 2 (x/2) so we will need cos x we know sin x = -.4 and x is in the fourth quadrant, …
  2. Math - Trig - Double Angles

    Prove: sin2x / 1 - cos2x = cotx My Attempt: LS: = 2sinxcosx / - 1 - (1 - 2sin^2x) = 2sinxcosx / - 1 + 2sin^2x = cosx / sinx - 1 = cosx / sinx - 1/1 = cosx / sinx - sinx / sinx -- Prove: 2sin(x+y)sin(x-y) = cos2y - cos2x My Attempt: …
  3. Math - Solving Trig Equations

    Solve each equation for 0 is less than and equal to "x" is less than and equal to 360 3sinx = 2cos^{2}x ----- I don't know how to solve this equation...this is what I have, but I don't know if I'm on the right track or not 3sinx = …
  4. trig

    2sin(x)cos(x)+cos(x)=0 I'm looking for exact value solutions in [0, 3π] So I need to find general solutions to solve the equation. But do I eliminate cos(x), like this... 2sin(x)cos(x)+cos(x)=0 2sin(x)cos(x)= -cos(x) 2sin(x) = …
  5. trig

    What kind of reflections are the following trig functions?
  6. trig

    What is the shift along x of the following trig functions?
  7. trig

    1. 3cot^2 (x) - 1 = 0 My answer: pi/3, 2pi/3, 4pi/3, 5pi/3 2. 4cos^2 (x) - 1 = 0 My answer: pi/3, 2pi/3, 5pi/3, 4pi/3 3. 2sin (x) + csc (x) = 0 My answer: unknown lol i got to the part: sin^2 (x) = -1/2 4. 4sin^3 (x) + 2sin^2 (x) - …
  8. trig

    Getting ready for trig semester finals. Can't figure out how they are simplifying these equations. (these are the review not actual test) tanx-sqr3=2tanx and 2sin^2+sinx=0
  9. trig

    2sin(4x)[(cos(3/2)x)(cos(5x/2)-sin((15/4)x)]+x can someone simplify this using trig identities?
  10. Math trig

    Hello guys. I am just wondering if tan^2 A (tan squared A) = sin^2 A /cos^2A And 2tan A = 2sin A / 2cos A This has been bothering me when I have to simplify trig. Thanks in advance.

More Similar Questions