1)sinA=a/c
sinA1=a1/c
sinA/sinA=(a/c)/(a1/c)=(a/c)*(c/a1)=a/a1
sinA/sinA1=a/a1
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1)sinA=a/c
sinA1=a1/c
sinA/sinA=(a/c)/(a1/c)=(a/c)*(c/a1)=a/a1
sinA/sinA1=a/a1