cait275 cait275
  • 13-03-2022
  • Mathematics
contestada

Given: a and b are first-quadrant angles, sin a = 5/13 , and cos b = 3/5 , evaluate cos(a + b).

16/65
33/65
56/65

Respuesta :

bdilsai06
bdilsai06 bdilsai06
  • 13-03-2022

Step-by-step explanation:

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