问题
解答题
证明:log2(4sin1110°)=1.
答案
证明:log2(4sin 1110°)=log2[4sin(3×360°+30°)]=log2(4sin 30°)=log22=1.
∴log2(4sin1110°)=1.
证明:log2(4sin1110°)=1.
证明:log2(4sin 1110°)=log2[4sin(3×360°+30°)]=log2(4sin 30°)=log22=1.
∴log2(4sin1110°)=1.