Adv
Deepak Bora
  • 0
Newbie

Trigonometric formula… Prove that : Sin² A=1-cos²A

  • 0

Prove this standard trigonometric identity: Sin² A=1-cos²A

Share

1 Answer

  1. To prove:- Sin²A = 1-cos² A

    In a right triangle

    SinA = P/H

    CosA = B/H

    substituting the values

    (P/H)² = 1- (B/H)²

    P²/H² = 1- B²/H²

    P²/H² = H² – B²/H².         (Taking LCM)

    According to P.G.T.  H²= P²+ B²

    ∴H² – B² = P²

    ∴ P²/H² = P²/ H².

    RHS= LSH ( Hence Proved)

     

    • -1
Leave an answer

Leave an answer

Browse

Choose from here the video type.

Put Video ID here: https://www.youtube.com/watch?v=sdUUx5FdySs Ex: "sdUUx5FdySs".

Captcha Click on image to update the captcha.

Related Questions