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COS
The COS function returns the cosine of an angle that is expressed in radians.
COS(radian-angle)
radian-angle: A number value representing an angle, expressed in radians. Although radian-angle can be any number, it would normally be in the range –π to π (–pi to pi).
Examples |
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=COS(1) returns 0.54030230586814, the cosine of 1 radian (approximately 57.3 degrees). =COS(RADIANS(60)) returns 0.5, the cosine of 60 degrees. =COS(PI()/3) returns 0.5, the cosine of π/3 radians (60 degrees). =COS(PI()) returns –1, the cosine of π radians (180 degrees). |