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20 12 college entrance examination science mathematics, the first big question behind, that is, 17 question, the second short answer question, do not know how to do it, please make it clear.
Which volume is it? If it is the national volume of the new curriculum standard. . It shouldn't be too difficult.

Because a = 60, we choose this area formula S=bcsinA/2=√3, that is, bc=4.

Cosine Theorem A 2 = B 2+C 2-2 BCCOSA is chosen because a=2.

Substitute BC = 4a = 60 into the above formula: 4 = B 2+C 2-4, that is, B 2+C 2 = 8.

Then substitute b=4/c into the above formula: c=2, so b=4/c=2.

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