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式子sin68-cos60sin8/cos68+sin60sin8的值是多少?

题目详情
式子sin68-cos60sin8/cos68+sin60sin8的值是多少?
▼优质解答
答案和解析
(sin68°-cos60°sin8°)/(cos68°+sin60°sin8°)
=[sin(60+8)-cos60sin8]/[cos(60+8)+sin60sin8]
=[sin60cos8+sin8cos60-cos60sin8]/[cos60cos8-sin60sin8+sin60sin8]
=sin60cos8/(cos60cos8)
=tan60
=√3