sin10度怎么解答？要求解过程。。cos10度呢？
cos10\u5ea6-cos10\u5ea6/sin10\u5ea6-cos10\u5ea6=-1\u4e3a\u4ec0\u4e48 \u6211\u77e5\u9053\u56e0\u4e3a sin10<cos10\u5ea6\u6240\u4ee5\u662f\u8d1f\u7684\u6309\u9898\u610f\u7406\u89e3\u5e94\u8be5\u662f\u8fd9\u6837\uff1a
|sin10\u5ea6-cos10\u5ea6|/\uff08sin10\u5ea6-cos10\u5ea6\uff09=-1 \uff1f
\u2235 sin10º<cos10º\u2234sin10\u5ea6-cos10\u5ea6<0
\u2234|sin10\u5ea6-cos10\u5ea6|=cos10º-sin10º
\u2234|sin10\u5ea6-cos10\u5ea6|/\uff08sin10\u5ea6-cos10\u5ea6\uff09=-1
1/sin10\u00b0-(\u6839\u53f73)/cos10\u00b0
=(cos10\u00b0-(\u6839\u53f73)sin10\u00b0)/(sin10\u00b0\u00d7cos10\u00b0)
=2(1/2 cos10\u00b0- (\u6839\u53f73)/2 sin10\u00b0))/(sin10\u00b0\u00d7cos10\u00b0
=2(sin30\u00b0cos10\u00b0-cos30\u00b0sin10\u00b0)/(sin10\u00b0\u00d7cos10\u00b0)
=2sin20\u00b0/(sin10\u00b0\u00d7cos10\u00b0)
=4sin20\u00b0/(2sin10\u00b0\u00d7cos10\u00b0)
=4sin20\u00b0/sin20\u00b0
=4
再用半角公式求sin15=?
sin15=(sin10+sin10/2)=?
∴sin10=……
剩下的自己算
sin（10）=sin（45-30）=sin45×cos30-cos45×sin30
=（√6-√2）/4
绛旓細銆姹傝В绛旀銆sin10掳=0.173648 銆愭眰瑙ｆ濊矾銆1銆佽繍鐢ㄥ凡鐭ヤ笁瑙掑嚱鏁扮殑绛夊紡 sin3伪=-4sin³伪+3sin伪,灏30掳鏀瑰啓鎴3脳10掳锛2銆佷护x=sin10掳,鍒欎笂寮忓彲浠ュ啓鎴愪笅鍒楁柟绋嬶紝鍗 4x³-3x+0.5=0锛3銆佽В涓鍏冧笁娆℃柟绋嬶紝鍙敤鏁板兼硶锛堝鐗涢】娉曪級銆傝繍鐢ㄤ笅鍒楀叕寮忚凯浠ｈ绠 杩欓噷锛宖(x(n))=4x(n...
绛旓細sin15=(sin10+sin10/2)=?鈭磗in10=鈥︹﹀墿涓嬬殑鑷繁绠
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