Basic Trigonometry Formulas

Basic Trigonometry Formulas

Trignometric Properties

sin\quad A\quad =\quad \cfrac { Perpendicular }{ Hypotenuse } \quad =\quad \cfrac { P }{ H }

 

cos\quad A\quad =\quad \cfrac { Base }{ Hypotenuse } \quad =\quad \cfrac { B }{ H }

tan\quad A\quad =\quad \cfrac { Perpendicular }{ Base } \quad =\quad \cfrac { P }{ B }

 

cosec\quad A\quad =\quad \cfrac { Hypotenuse }{ Perpendicular } \quad =\quad \cfrac { H }{ P }

 

sec\quad A\quad =\quad \cfrac { Hypotenuse }{ Base } \quad =\quad \cfrac { H }{ B }

 

cot\quad A\quad =\quad \cfrac { Base }{ Perpendicular } \quad =\quad \cfrac { B }{ P }

 

Trignometric Identities

tan\quad A\quad =\quad \cfrac { sin\quad A }{ cos\quad A }

 

cot\quad A\quad =\quad \cfrac { cos\quad A }{ sin\quad A }

 

cosec\quad A\quad =\quad \cfrac { 1 }{ sin\quad A }

 

sec\quad A\quad =\quad \cfrac { 1 }{ cos\quad A }

 

{ sin }^{ 2 }A\quad +\quad { cos }^{ 2 }A\quad =\quad 1

 

tan^{ 2 }A\quad +\quad 1\quad =\quad { sec }^{ 2 }A

 

cot^{ 2 }A\quad +\quad 1\quad =\quad cosec^{ 2 }A

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