已知角a的顶点在坐标原点,始边与x轴的非负半轴重合,终边经过点p(-3/5,4/5)
已知角a的顶点在坐标原点,始边与x轴的非负半轴重合,终边经过点p(-3/5,4/5)
求cos(a+兀/2)+sin(兀+a)/tan(-a)的值.我赶着救命.
/jia/The best and most beautiful things in the world can not be seen or even touched,they must be felt with heart.
求cos(a+兀/2)+sin(兀+a)/tan(-a)的值.我赶着救命.
/jia/The best and most beautiful things in the world can not be seen or even touched,they must be felt with heart.
可能相似的问题
-
1年前2个回答
你能帮帮他们吗
精彩回答