Math, asked by giigt47612, 5 months ago

pls answer before 4:00 humble request ... today ...

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Answered by chandana647

1

Step-by-step explanation:

sin(A-B)=1/2. cos(A+B)=1/2

sinAcosB-cosAsinB=1/2. cosAcosB-sinAsinB=1/2

equating on b.s

sinAcosB-cosAsinB=cosAcosB-SinAsinB

sinAcosB-cosAcosB=cosAsinB -sinAsinB

cosB(sinA-cosA)=sinB(cosA-sinA)

tanB=-1

B=135 degree

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