if cos a = 1/2 sin B = 1/2 then find the value of (a and B)
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Cosa= 1/2
But cos60° = 1/2 then a= 60
Same B =30°
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CosA=1\2 Cos60=1\2. Therefore A=60 . SinB=1\2. Sin30=1\2. Therefore B=30
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