Mathematics
Senior High
請問這題怎麼訂正
由180°-日關係可得
2√5
sin(180°−a) =sin a=
5
隨堂練習
已知為銳角,若sin 0:
=
,
3
試求sin(90°+日)+cos(90°)的值.
角因止
設直線
且斜角
如下白
2√2+1
3
Answers
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