Please help?

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1 Answer

Hence, the answer is
#B#

Explanation:

#sin(A-B)=sinAcosB-cosAsinB#
Given:
#sinA=3/5#
#cosB=4/5#
To find:
#sin(A-B)#
#sin(A-B)=sinAcosB-cosAsinB#
#sinA=3/5#
implies
#cosA=4/5#
#cosB=4/5#
implies
#sinB=3/5#
#sinAcosB=3/5xx4/5-4/5xx3/5#
#=12/25-12/25=0#
Hence, the answer is
#B#