The quasi-elliptic function filter with one transmission zero has the better selectivity than the general Chebyshev filter.
带有一对传输零点的准椭圆函数滤波器相比切比雪夫型滤波器具备更好的选择性。
With the use of the properties of the second Chebyshev polynomial, a group of interesting identity of sine and cosine function is obtained.
利用第二类契贝谢夫多项式的性质得到了关于正余弦函数的一组有趣的恒等式。
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