関連ワード:  what is the range of cot function    what is the period of cot function    what is the domain of cot function    what is the period of cotangent function    what is the range of cot inverse function    what is the range of the cotangent function in interval notation    what is the domain of the inverse cotangent function    what is the period of tangent and cotangent functions    what is the range of the function y cot x    what is the range of the function y=cot(x) all real numbers