identidades trigonométricas
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Identidadaes Trigonometricas,seno,tangente,cotangente,secanteTRANSCRIPT
7/17/2019 Identidades Trigonométricas
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Identidades Trigonométricas
1. Identidades Reciprocas:
•
1csc( )
( ) senα
α =
⇒
( ). csc( ) 1 sen α α =
•
1sec( )
cos( )
α
α
=
⇒cos( ).sec( ) 1α α
=
•
1cot( )
tan( )α
α =
⇒
tan( ).cot( ) 1α α =
2. Identidades por Cociente:
•
( )tan( )
cos( )
sen α α
α =
•
cos( )cot( )
( ) sen
α α
α
=
3. Identidades Pitagóricas:
•
2 2( ) cos ( ) 1 sen α α + =
o
2 21 cos ( ) ( ) senα α − =
o
2 21 ( ) cos ( ) sen α α − =
•
2 21 tan ( ) sec ( )α α + =
o
2 2sec ( ) 1 tan ( )α α − =
4. Identidades Auxiliares:
Identidades Trigonométricas
para Dos Variables( ) ( ).cos( ) ( ).cos( ) sen sen senα β α β β α + = +
( ) ( ).cos( ) ( ).cos( ) sen sen senα β α β β α − = −
cos( ) cos( ).cos( ) ( ). ( ) sen senα β α β α β + = −
cos( ) cos( ).cos( ) ( ). ( ) sen senα β α β α β − = +
tan( ) tan( )tan( )
1 tan( ).tan( )
α β α β
α β
++ =
−
tan( ) tan( )tan( )
1 tan( ).tan( )
α β α β
α β
−− =
+
Identidades Auxiliares
tan( ) tan( ) tan( ) tan( ) tan( ) tan( )α β α β α β α β+ + + = +
tan( ) tan( ) tan( ) tan( ) tan( ) tan( )α β α β α β α β− − − = −
2 2( ) ( ) ( ). ( ) sen sen sen senα β α β α β − = + −
2 2cos ( ) cos ( ) ( ). ( ) sen senβ α α β α β − = + −
2 2cos ( ) ( ) cos( ).cos( ) senα β α β α β − = + −
2 2 2 2. ( ) .cos( ) ,a b a sen b a b xα α − + ≤ + ≤ + ∀ ∈ ¡
tan( ) cot( ) sec( ).csc( )α α α α + =
2 2 2 2sec ( ) csc ( ) sec ( ). csc ( )α α α α + =
4 4 2 2( ) cos ( ) 1 2 ( ).cos ( ) sen senα α α α + = −
6 6 2 2( ) cos ( ) 1 3 ( ).cos ( ) sen senα α α α + = −
4 4 2 2sec ( ) tan ( ) 1 2 sec ( ). tan ( )α α α α + = +
4 4 2 2csc ( ) cot ( ) 1 2 csc ( ). cot ( )α α α α + = +
6 6 2 2csc ( ) cot ( ) 1 3 csc ( ). cot ( )α α α α − = +
[ ] [ ] [ ]2
1 ( ) cos( ) 2 1 ( ) 1 cos( ) sen senα α α α ± ± = ± ±
2 2 2 2( ) ( ) tan ( ). ( )tan sen senα α α α + =
2 2 2 2cot ( ) cos ( ) cot ( ). cos ( )α α α α − =