Let S be a square, let M and N be the midpoints of two adjacent sides, and let V be the corner of the square that is opposite both M and N. Let θ be the measure of the angle between the two lines connecting M and N with V. Compute sin(θ)
要求不能用三角函數公式
Let S be a square, let M and N be the midpoints of two adjacent sides, and let V be the corner of the square that is opposite both M and N. Let θ be the measure of the angle between the two lines connecting M and N with V. Compute sin(θ)
要求不能用三角函數公式
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3/5
-萬斤油-
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09/26/2022 postreply
19:06:06
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三角形等腰。三邊容易求出。用麵積公式即可算出頂角的正弦。
-wxcfan123-
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10/08/2022 postreply
13:21:41
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