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If tan a=1 upon root 3 and sin b = 1 upon 2 then cos(a+b)=? |
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Answer» 1/2tan a =1/root3 =TAN(30)a=30*SIN b=1/2. = sin30b=30*COS(a+b)= cos(30+30)=cos60=1/2 |
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