Respuesta :

mathstudent55

Answer:

sec a csc a

Step-by-step explanation:

tan a + cot a =

= sin a / cos a + cos a / sin a

= sin² a / (sin a cos a) + cos²a / (sin a cos a)

= (sin² a + cos²a) / (sin a cos a)

= 1 / (sin a cos a)

= sec a csc a

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