This encyclopedia comprises trigonometric identification proofs for a few 300 identities. The booklet is gifted within the kind of mathematical video games for the reader's amusement and incorporates a concordance of trigonometric identities, permitting effortless reference. Trig or deal with is a must have for: * each pupil of trigonometry, to discover the proofs for trigonometric identities which may be set at school or in checks; * each instructor of trigonometry, to have quick access to trigonometric identities of other degrees of trouble, to set assignments for various degrees of scholars; * each library, to supply a prepared source for college kids * each aficionado of Sudoku, crossword puzzles, jigsaw puzzles, Tetris, and different video games, who love an highbrow problem.

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