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| O REDMI NOTE 5 PROMI DUAL CAMERA 2019/1/

Answer»

2tan30/(1+tan30*tan30) = (2*1/√3 )/ (1+1/√3 * 1/√3) = (2/√3 )/ (1+1/3) = (2/√3)/(4/3) = √3/2



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