

Gọi a,b là các số nguyên thoả mãn :
[tex]\left ( 1+ \tan1^{\circ} \right )\left ( 1+ \tan2^{\circ} \right )\left ( 1+ \tan3^{\circ} \right )......\left ( 1+ \tan43^{\circ} \right )= 2^{a}\left ( 1+ \tan b^{\circ} \right )[/tex] đồng thời a,b [tex]\epsilon \left [ 0;90 \right ][/tex]
[tex]\left ( 1+ \tan1^{\circ} \right )\left ( 1+ \tan2^{\circ} \right )\left ( 1+ \tan3^{\circ} \right )......\left ( 1+ \tan43^{\circ} \right )= 2^{a}\left ( 1+ \tan b^{\circ} \right )[/tex] đồng thời a,b [tex]\epsilon \left [ 0;90 \right ][/tex]
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