What does SIN mean and how to use it in C language

SIN is a mathematical function in the math.h header file in the C standard library that is used to calculate the sine of a given angle in radians. The usage is sin(double angle), where angle is the radian value, and the function returns a double type floating point number representing the sine value of the given angle.

What is SIN in C language

SIN is math.h in the C language standard library A mathematical function defined in the header file to calculate the sine of a given angle.

Usage

The prototype of the SIN function is as follows:

<code class="c">double sin(double angle);</code>

Among them:

• angle : The radian value whose sine is to be calculated.

Return value

The SIN function returns a double type floating point number, representing the sine value of the given angle.

Sample Code

The following code example demonstrates how to use the SIN function:

<code class="c">#include <stdio.h>
#include <math.h>

int main() {
    double angle = 30.0 * M_PI / 180.0;  // 转换为弧度
    double sine = sin(angle);

    printf("正弦值：%f\n", sine);  // 输出正弦值

    return 0;
}</code>

Output:

<code>正弦值：0.5</code>

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