Trig help ..............

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asked Jul 14, 2018 93.5k views

1 Answer

Subin · Answer 1 · 2018-07-20T09:22:51+0000

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

Trig help ..............

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