cos()
설명
각(라디안)의 코사인 계산. 결과는 -1과 1 사이.
문법
cos(rad)
매개변수
- rad: 라디안 각 (float).
반환값
- 각의 코사인 (double).
예제 코드
void setup() {
Serial.begin(9600);
for (int angle = 0; angle <= 180; angle += 15) {
float angle_rad = angle * M_PI / 180;
float cos_result = cos(angle_rad);
Serial.print("cos(");
Serial.print(angle);
Serial.print("°) = ");
Serial.println(cos_result);
}
}
void loop() {
}
The result in Serial Monitor:
COM6
cos(0°) = 1.00
cos(15°) = 0.97
cos(30°) = 0.87
cos(45°) = 0.71
cos(60°) = 0.50
cos(75°) = 0.26
cos(90°) = -0.00
cos(105°) = -0.26
cos(120°) = -0.50
cos(135°) = -0.71
cos(150°) = -0.87
cos(165°) = -0.97
cos(180°) = -1.00
Autoscroll
Clear output
9600 baud
Newline
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