Page 17 - KIV - trigonometria 3

Trigonometría 3° Secundaria

4. Simplificar: Resolución:
 7x  3x   7x  3x 
 2Sen    Sen  
Cos7x  Cos3x  2   2 
E  E 
Sen5x Sen5x
 2Sen5x Sen2x

E  
Sen5x
 E=-2Sen2x

5. Simplificar: Resolución:
 4x  2x   4x  2x 
Sen4x  Sen2x 2Sen   2    Cos   2  
E  E 
Cos4x  Cos2x  4x  2x   4x  2x 
2Cos    Cos  
 2   2 
2Sen3x Cosx

E 

2Cosx Cosx
Sen3x
E 
Cos3x
 E=Tg3x

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4 Bimestre -108-