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ADNAN MUHAMMED

Grade 12,

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Plz answer this ......................................................................................................

Plz answer this ......................................................................................................

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Grade:11

1 Answers

sonika p
129 Points
6 years ago
in triangle, ABC, A+B+C = 180
A+B =180-C
sin(A+B) = sinC
sinB/sin(A+B) = sinB/sinC.....(1)
according to sine rule, 
sinB/b = sinC/c
Thus, sinB/sinC = b/c
sinB/sin(A+B) = b/c
Answer is option 2.

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