TWELVE TRIGONOMETRY PROOFS

  1.                                                                     Proof.
  2.                                                     Proof.
  3.        Proof.
  4.                                   Proof.
  5.          Proof.
  6.                                       Proof.
  7.                              Proof.
  8.                                           Proof.
  9.                                           Proof.
  10.                                            Proof.
  11.                                  Proof.
  12.                                   Proof.