I need help to a Maths question

Replies

• 

  yadavundertaker mohit

  sin(-1)^(y)=2cos^(-1)(x)
  
  y=sin(2cos^(-1)(x))
  
  using sin2x= 2sinx*cosx
  
  y=2sin(cos^(-1)(x)).cos(cos^(-1)(x))
  
  y=2sin(cos^(-1)(x))
  
  using sin(x)=(1-cos^2(x))^(1/2)
  
  y=2(1-cos^2(cos^(-1)(x)))(1/2)
  
  y=2x(1-x*x)^(1/2)
  
  squaring both sides we get
  
  
  y^2= 4(x)^2 [(1-(x)^2 )]
  
  
  
  hence proved.....
• 

  gdotnet

  I cant say how much I appreciate....I had the sum for three years....I always get stuck somewhere.... Thank you!
• 

  yadavundertaker mohit

  gdotnet

  I cant say how much I appreciate....I had the sum for three years....I always get stuck somewhere.... Thank you!

  
  no thanks......it was an easy question.if you have more then you can ask..