why only cosine is used for direction in directional cosines
Dear student,
Cosines have a property that whether an angle be positive or negative, the cosine of it will always be positive. This is not true for sin or tan. Hence cosines have greater significance and used for direction cosines.
Regards
Cosines have a property that whether an angle be positive or negative, the cosine of it will always be positive. This is not true for sin or tan. Hence cosines have greater significance and used for direction cosines.
Regards