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高中数学中有许多与“1”有关的知识,指数函数图象经过的定点(0,1),对数函数图象经过的定点(1,0),三角函数中借助单位圆定义正弦、余弦、正切,sin~2α+sin~2α=1,椭圆、双曲线的标准方程右边为1,椭圆离心率在0到1之间,双曲线离心率大于1,抛物线离心率等于1,平面向量中的单位向量,必然事件的概率为1等.如此多的知识都与它有关,可见“1”确实
There are many “1” related knowledge in high school mathematics. The fixed point (0,1) passes through the image of the exponential function, the fixed point (1,0) passes through the logarithmic function image, and the sine is defined in the trigonometric function by means of the unit circle. Cosine, tangent, sin~2a+sin~2[alpha]=1, the right side of the standard equation for elliptic and hyperbolic curves is 1, the eccentricity of the ellipse is between 0 and 1, the hyperbola eccentricity is greater than 1, the parabola eccentricity is equal to 1, the plane The unit vector in the vector, the probability of an inevitable event is 1 and so on. So much knowledge is related to it, visible “1”