Taykeya
Taykeya
09-10-2016
Mathematics
contestada
Sin205Cos85-Cos205Sin85
Respuesta :
Jimmy1999
Jimmy1999
09-10-2016
Remember that :
sin a . cos b - cos a. sin b = sin (a-b)
so :
sin 205. cos 85 - cos 205 . sin 85
= sin (205 - 85)
= sin 120
= sin ( 180-60)
= sin 60
= ½ √3
Hopefully helpfull... :)
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