gdotnet Member Member since Oct 30, 2009 Last active Oct 30, 2009 Total activities 0 Activity feed Recent contributions #Threads 16 years ago 4eac9e87-9e82-4cb7-b3f2-4fa8c9256565 I cant say how much I appreciate....I had the sum for three years....I always get stuck somewhere.... Thank you! #Threads 16 years ago I need help to a Maths question Given: sin^(-1)(y)=2cos^(-1)(x) Prove that😔 y)^2= 4(x)^2 [(1-(x)^2 )]
