SOLVED:Based on the addition formulas: sin(x y)=sinx cosy cosx siny sin(x-y)=sinx cosy-cosx siny cos(x y)=cosx cosy-sinx siny cos(x-y)=cosx cosy sinx siny Calculate cos(π/ 3), given that sin(π/ 6)=1 / 2 and cos(π/ 6)=√(3) / 2 .
SOLVED:Based on the addition formulas: sin(x y)=sinx cosy cosx …
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