Well, using, again, the double Angle formula.
再次利用二倍角公式。
At unstable state the formula of calculating unstable time using tangent Angle is established.
对于失稳的情况，建立了用割线角估算失稳时间的一般公式。
The formula of wedge angle is deduced under the condition of two-beam interference.
在考虑双光束干涉的情况下，导出测量平板楔角的公式；
The angle of fluctuation and the distance formula are obtained.
并给出了有效前沿的漂移角度及漂移距离公式。
The angle of fluctuation and the distance formula are obtained.
并给出了有效前沿的漂移角度及漂移距离公式。
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