问题描述:
一道数学题目,英文的
A missile is fired vertically from a point that is 5 mi from a tracking station and at the the same elevation. For the first 20 sec. of flight , its angle of elevation changes at a constant rate of 2° per socond. Find the velocity of the missile when the angle of elevation is 30°.
要解一下,过程能越详细越好..
A missile is fired vertically from a point that is 5 mi from a tracking station and at the the same elevation. For the first 20 sec. of flight , its angle of elevation changes at a constant rate of 2° per socond. Find the velocity of the missile when the angle of elevation is 30°.
要解一下,过程能越详细越好..
问题解答:
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