関連ワード:  what is the domain of cot function    what is the domain of cotangent function    what is the domain of secant function    what is the range of cot function    what is the period of cot function    what is the period of cotangent function    what is the range of cotangent function    what is the domain and range of cot function    what is the range of secant function    what is the period of secant function