英语词汇“三角恒等式”的翻译、意思、用法、释义-英汉汉英双解词典

单词	三角恒等式
释义	三角恒等式 sān jiǎo héng děng shì含有三角函数的恒等式。如sin2α+cos2α＝1，tgα＝sinαcosαα≠nπ+π2，n是整数。hjhj
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