itsme19
itsme19
10-05-2017
Mathematics
contestada
trig help ..............
Respuesta :
EEPJR
EEPJR
11-05-2017
sinA = 3/5
cosA = 4/5
cosB = 3/5
sinB = 4/5
sin(A+B) = sinAcosB + cosAsinB
= (3/5)(3/5) + (4/5)(4/5)
= 9/25 + 16/25
=(9+16)/25
=25/25
=1
therefore, the answer is B
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