Hàm này hoạt động trong Google Sheets giống như trong Excel — cùng cú pháp và đối số.
COS(number)The COS function calculates the cosine of an angle provided in radians. If your angle is in degrees, you must multiply it by PI()/180 or use the RADIANS function to convert it.
=COS(0)Kết quả: 1
Returns the cosine of 0 radians, which is 1.
=COS(RADIANS(60))Kết quả: 0.5
Converts 60 degrees to radians and returns the cosine, which is 0.5.
Excel expects the input to be in radians. If your input is in degrees, ensure you convert it using the RADIANS function.