Pre Cal

posted by .

Sec^2 2u-1/Sec^2 2u = Sin^2 2u

  • Pre Cal -

    since all angles are 2u , let Ø - 2u for ease of typing

    I will assume you are proving this as an identity

    LS = (1/cos^2 Ø - 1)/(1/cos^2 Ø)
    = (1 - cos^2 Ø)/cos^2 Ø * (cos^2 Ø)
    = 1 - cos^2 Ø
    = sin^2 Ø
    = RS

    replace Ø with 2u if you have to

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Integration

    Intergrate ¡ì sec^3(x) dx could anybody please check this answer. are the steps correct?
  2. trig

    how do you start this equation i've been tryng it for 20min. sec^6x(secxtanx)-sec^4x(secxtanx)=sec^5xtan^3x ec^6x(secxtanx)-sec^4x(secxtanx)=sec^5xtan^3x Factor out a sec^5 tan and divide thru. Left is sec^2 x = Tan^2 x Then this should …
  3. math

    How would you establish this identity: (1+sec(beta))/(sec(beta))=(sin^2(beta))/(1-cos(beta)) on the right, sin^2 = 1-cos^2, that factor to 1-cos * `1+cos, then the denominator makes the entire right side 1+cosB which is 1+1/sec which …
  4. pre-cal

    what are the steps to solve sec y sin (pi/2-y)=1
  5. Pre-Cal

    I do not know how to find the angle of the function sec 4x = 2 on the unit cirlce. I know I would be looking for 2 but I don't know where since it is sec.
  6. Pre-Cal

    I do not know how to find the angle of the function sec 4x = 2 on the unit cirlce. I know I would be looking for 2 but I don't know where since it is sec.
  7. Pre-Cal

    Simplify the expression 1/tan^2x+1 tan^2x+1 = sec^2x = 1/sec^2x I am not sure what 1/sec^2x is equal to
  8. Pre-Cal

    I'm trying to do this identities homework and i can't figure this one out. sec^4x + (tan^2x)(sec^2x)= sec^4x
  9. calculus trigonometric substitution

    ∫ dx/ (x^2+9)^2 dx set x = 3tan u dx = 3 sec^2 u du I = 3 sec^2 u du / ( 9 tan^2 u + 9)^2 = 3 sec^2 u du / ( 81 ( tan^2 u + 1)^2 = sec^2 u du / ( 27 ( sec^2 u )^2 = du / ( 27 sec^2 u = 2 cos^2 u du / 54 = ( 1 + cos 2u) du / 54 …
  10. Pre Calculus

    Multiply; then use fundamental identities to simplify the expression below and determine which of the following is not equivalent. (sin x + cos x) ^2 a. 1+2sinxcosx b. sec^2x−tan^2x+2cosxsinx c.sec x + 2 sin x/sec x d. sin^2x+cos^2x …

More Similar Questions