新人教a版高中數(shù)學(xué)必修413三角函數(shù)的誘導(dǎo)公式-在線瀏覽
2025-01-20 17:35本頁面
【正文】 a n( ) t a n? ? ???公式二 ??45t a n3)1s i n (2210c o s求下列三角函數(shù)值：??s in ( ) s in? ? ?? ? ?c o s ( ) c o s? ? ?? ? ?t a n( ) t a n? ? ???公式三 ???sin y? ?1r?c os x? ? ta n yx? ?s in ( ) y?? ? ?c o s ( ) x???t a n( ) yyxx? ?? ? ? ?s in( ) s in??? ? ?c o s ( ) c o s????t a n( ) t a n??? ? ?公式三 )313t a n (4)420c o s (3)5s i n (2)39。670c o s (100??????、求下列三角函數(shù)值：s in( ) s in??? ? ?c o s ( ) c o s????t a n( ) t a n??? ? ?公式四 ????sin y? ?1r?c os x? ? ta n yx? ?s in( ) y????c o s ( ) x??? ? ?t a n( ) yyxx??? ? ? ??s in( ) s in? ? ???c o s ( ) c o s? ? ?? ? ?t a n( ) t a n
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