问题描述:
函数规律
sin^2 π/6+cos^2 π/3+sin π/6 cosπ/3=3/4
sin^2 π/9+cos^2 5π/18+sin π/9 cos5π/18=3/4
观察以上式子得到一般规律式是?
sin^2 π/6+cos^2 π/3+sin π/6 cosπ/3=3/4
sin^2 π/9+cos^2 5π/18+sin π/9 cos5π/18=3/4
观察以上式子得到一般规律式是?
问题解答:
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