In this paper,the concept of the logic sine cosine function,which is a new type of two value logic function reformed by combining the sine cosine function with Boolean algebra,is presented.

On some identities of sine and cosine functions;

Aim To study some calculation formula of sine function and cosine function.

The Development of the Courseware of Applying Visual Basic Language to Simulating "Drawing Image of Sine Function with Sine Line";

Draw Sine Function Image with Computer;

On some identities of sine and cosine functions;

The numerical expression of trigonometric function and its approximate expression are discussed in detail,a kind of analog electric circuit for sinusoidal function is designed using analog multiplier/divider,and the direct analog circuits for the computation of the attitude parameters with negative feedback are also presented.

This paper presents a new model of chaotic neural network whose activation func- tion is composite of Sinusoidal function and Sigmoid function by analyzing the bifurcation process and Lyapunov exponent spectrum.