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做高一数学

做高一数学

在△ABC中。SINa乘COS b<0   则此三角形是  A钝角三角形B锐角三角形C直角三角形D等腰三角形

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It's not related to English.
Think about what you should do, not about what you should have done.

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A钝角三角形
Think about what you should do, not about what you should have done.

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choose A
Use my enthusiasm and honesty to win true friends
Waiting for you here ^_^

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maybe D is RIGHT ALSO.
一起提高英语水平!

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Am i right?
一起提高英语水平!

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顶角为钝角的三角形,所以此题不严密!
一起提高英语水平!

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Do you agree?
一起提高英语水平!

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什么时候这成了数学论坛了?

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数学? 我开始还以为是英语出的题目呢???
钝角啦,只有钝角cos才是负的

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