Table

Table 8

Quadrant	\({\sin\, \theta,\,\csc\, \theta }\)	\({\cos\, \theta,\,\sec\, \theta }\)	\({\tan\, \theta ,\,\cot\, \theta }\)	Conclusion
I	Positive	Positive	Positive	All trigonometric functions are positive.
II	Positive	Negative	Negative	Only sine and its reciprocal, cosecant, are positive.
III	Negative	Negative	Positive	Only tangent and its reciprocal, cotangent, are positive.
IV	Negative	Positive	Negative	Only cosine and its reciprocal, secant, are positive.