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Signs of trigonometric functions

Trigonometry

$$\begin{array}{|c|c|c|c|c|} \hline  \text{Quadrant} & \sin\alpha & \cos\alpha & \tan\alpha & \cot\alpha & \sec\alpha & \text{cosec} \ \alpha \\\hline \text{I} & + & + & + & + & + & + \\\hline \text{II} & + & - & - & - & - & + \\\hline \text{III} & - & - & + & + & - & - \\\hline \text{IV} & - & + & - & - & + & - \\\hline \end{array}$$

Last time edited 2017-10-29

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